(19)
(11)EP 2 709 307 A2

(12)EUROPEAN PATENT APPLICATION

(43)Date of publication:
19.03.2014 Bulletin 2014/12

(21)Application number: 13180336.3

(22)Date of filing:  14.08.2013
(51)Int. Cl.: 
H04L 9/00  (2006.01)
G06F 17/30  (2006.01)
H04L 9/32  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 21.08.2012 US 201213590372

(71)Applicant: Xerox Corporation
Rochester, New York 14644 (US)

(72)Inventor:
  • Cancedda, Nicola
    38000 Grenoble (FR)

(74)Representative: Skone James, Robert Edmund 
Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street
London EC2A 2ES
London EC2A 2ES (GB)

  


(54)Methods and systems for securely accessing translation resource manager


(57) The disclosed embodiments relate to systems and methods for securely accessing a phrase table. One or more records in the phrase table are encrypted (402) using a first set of keys. The first set of keys is encrypted (406) using a second key. A decoder module is compiled (408) based on the second key. Thereafter, the one or more encrypted records and/or the decoder module are transmitted (410) to the first computing device at the client side. The first set of encrypted keys is transmitted (412) to a second computing device. The first computing device transmits (420) a request to the first computing device to send an encrypted key. The decoder module decrypts (424) the encrypted key to generate a key. The first computing device uses the key to decrypt (426) one or more encrypted records.




Description


[0001] The presently disclosed embodiments are related to a systems and method to access a server. More specifically, the presently disclosed embodiments are related to systems and method for securely accessing a translation resource manager.

[0002] Translation Resource Manager (TRM) is a system that enables a user to translate a linguistic phrase from a first language to a second language. A client system receives a sentence to be translated from a user. The client system may include a decoder module that breaks the sentence in one or more phrases that are sent to the TRM. The TRM may include a phrase table containing a plurality of source phrases and corresponding translated phrases in the second language. On receiving the request to translate the phrase, the TRM searches for the phrase in each of the plurality of source phrases. Thereafter, the TRM server determines one or more corresponding translated phrase from the phrase table. The TRM server transmits the one or more translated phrase to the client.

[0003] In certain scenarios, the client needs to translate a confidential phrase. For the purpose of such translation, the client may have to transmit the confidential phrase to the TRM. The transmission of the confidential phrase may be undesirable to the client.

[0004] According to embodiments illustrated herein, there is provided a computer implemented method of providing a secure access to a phrase table. The computer implemented method includes encrypting one or more records in the phrase table to generate one or more encrypted records. The phrase table facilitates translation of a first phrase from a first language to a second language. The one or more records comprise at least a phrase in the second language. Further, the computer implemented method includes transmitting the one or more encrypted records to a first computing device.

[0005] According to embodiments illustrated herein, there is provided a computer implemented method of securely accessing a phrase table. The computer implemented method includes generating a query to access one or more encrypted records in the phrase table. The phrase table facilitates translation of a first phrase from a first language to a second language. The query includes the first phrase in the first language. The one or more encrypted records comprise at least a phrase in the second language.

[0006] According to embodiments illustrated herein, there is provided a Translation Resource manager (TRM). The TRM includes an encryption module configured to encrypt one or more records in a phrase table to generate one or more encrypted records. The phrase table facilitates translation of a first phrase from a first language to a second language. The one or more records comprise at least a phrase in the second language. Further, the TRM includes a communication manager configured to transmit the one or more encrypted records through a transceiver to a first computing device.

[0007] According to embodiments illustrated herein, there is provided a computing device for securely accessing a phrase table. The computing device includes a query manager configured to generate a query to access one or more encrypted records in the phrase table. The phrase table facilitates translation of a first phrase from a first language to a second language. The query includes the first phrase in the first language. The one or more encrypted records comprise at least a phrase in the second language.

[0008] Various embodiments will hereinafter be described in accordance with the appended drawings, which are provided to illustrate, and not to limit, the scope in any manner, wherein like designations denote similar elements, and in which:

[0009] FIG. 1 is a block diagram illustrating a system environment, in which, various embodiments can be implemented;

[0010] FIG. 2 is a message flow diagram illustrating flow of messages between the various components of the system environment in accordance with at least one embodiment;

[0011] FIG. 3 is another message flow diagram illustrating flow of messages between the various components of the system environment in accordance with at least one embodiment;

[0012] FIG. 4 is yet another message flow diagram illustrating flow of messages between the various components of the system environment in accordance with at least one embodiment;

[0013] FIG. 5 is a block diagram of a TRM in accordance with at least one embodiment;

[0014] FIG. 6 is a flowchart illustrating a method implemented on a TRM in accordance with at least one embodiment;

[0015] FIG. 7 is another flowchart illustrating a method implemented on a TRM in accordance with at least one embodiment;

[0016] FIG. 8 is yet another flowchart illustrating a method implemented on a TRM in accordance with at least one embodiment;

[0017] FIG. 9 is a block diagram of a computing device at client side in accordance with at least one embodiment;

[0018] FIG. 10 is a flowchart illustrating a method implemented on a computing device at client end in accordance with at least one embodiment;

[0019] FIG. 11 is another flowchart illustrating a method implemented on a computing device at client end in accordance with at least one embodiment; and

[0020] FIG. 12 is yet another flowchart illustrating a method implemented on a computing device at client end in accordance with at least one embodiment.

[0021] Definitions:

[0022] The following terms shall have, for the purposes of this application, the respective meanings set forth below.

[0023] A "phrase table" refers to a collection of source phrases in a first language and corresponding one or more records that include phrases in a second language. In an embodiment, the phrase table includes one or more scores indicative of the relevance of a record. For example, a phrase table to translate French to English will include one or more source phrases in French. Each of the one or more source phrases will correspond to record in English language. In an embodiment, the phrase table includes multi-lingual translations for the each of the one or more source phrases.

[0024] A "record" refers to a linguistic phrase in the second language. Hereinafter, record has been replaceably referred to as translated phrase.

[0025] A "source phrase" refers to a linguistic phrase in the first language.

[0026] "Encryption" refers to method of transforming a phrase in an unreadable form. In an embodiment, the encryption method utilizes a key to encrypt the phrase. Some examples of the encryption method include Digital rights managements (DRM) techniques, WPA, WEP, Data Encryption Standard algorithm (DES), etc.

[0027] A "digest" refers to cryptographic hash value for a phrase that is generated by a cryptographic hash function. Some examples of cryptographic hash function include SHA-1, MD5, SHA-0, etc. In the ongoing description the term "digest" is used for illustrative purpose. Various other terms such as "fingerprints", "checksums", and "hash value" can also be used in place of the term "digest".

[0028] A "Key" refers to a piece of information that determines the functional output of an encryption method.

[0029] A "decryption key" refers to a piece of information that is utilized by a decryption algorithm to decrypt an encrypted data.

[0030] A "query" refers to a request to extract information from a database or a storage medium. In an embodiment, the query is used to extract a record from a phrase table. The query includes a phrase in a first language.

[0031] FIG. 1 is a block diagram illustrating a system environment 100, in which, various embodiments can be implemented. The system environment 100 includes a first computing device 102, a network 104, a TRM 106, and a second computing device 108.

[0032] The first computing device 102 generates one or more queries that include one or more phrases in a first language. In an embodiment, a user of the first computing device 102 inputs the query that includes a phrase for translation. In an embodiment, the one or more phrases in the first language are to be translated to a second language. Some of the examples of the first computing device 102 include a personal computer, a laptop, a PDA, a mobile device, a tablet, or any device that has the capability to generate one or more queries. The first computing device 102 is described later in conjunction with FIG. 9.

[0033] The network 104 corresponds to a medium through which the content and the messages flow between various components (e.g. the first computing device 102, the TRM 106, and the second computing device 108) of the system environment 100. Examples of the network 104 may include, but are not limited to, a Wireless Fidelity (WiFi) network, a Wireless Area Network (WAN), a Local Area Network (LAN) or a Metropolitan Area Network (MAN). Various devices in the system environment 100 can connect to the network 104 in accordance with various wired and wireless communication protocols such as Transmission Control Protocol and Internet Protocol (TCP/IP), User Datagram Protocol (UDP), 2G, 3G or 4G communication protocols.

[0034] The TRM 106 includes one or more phrase tables. In an embodiment, the TRM 106 encrypts one or more records in at least one phrase table based on first set keys to generate one or more encrypted records. Thereafter, the TRM 106 transmits the one or more encrypted records to the first computing device 102. The structure of the TRM 106 is described later in conjunction with FIG. 5.

[0035] The second computing device 108 receives a first set of keys from the TRM 106. In an embodiment, the second computing device 108 maintains a log about the usage of the first set of keys. In an embodiment, the usage of the first set of keys includes, but is not limited to, the number of keys from the first set of keys used by the first computing device 102, the number of times a key has been used by the first computing device 102, etc. Some of the examples of the second computing device 108 include a personal computer, a laptop, a PDA, a mobile device, a tablet, or any device that has the capability to maintain a log about the first set of keys.

[0036] The operation and interaction between the various components of the system environment 100 has been described in conjunction with FIG. 2, FIG. 3, and FIG. 4.

[0037] FIG. 2 is a message flow diagram 200 illustrating the flow of messages/data between the various components of the system environment 100 in accordance with at least one embodiment. The message flow diagram 200 is described in conjunction with FIG. 1.

[0038] The TRM 106 (refer FIG. 1) includes a phrase table containing one or more source phrases and corresponding one or more records. The TRM 106 encrypts the one or more records using a first set of keys (depicted by 202) to generate one or more encrypted records. In an embodiment, the TRM 106 encrypts all the records in the phrase table using the first set of keys. In an embodiment, each record is encrypted using a key in the first set of keys. Further, the TRM 106 computes a first digest for each of the one or more source phrases using a cryptographic hash function (depicted by 204). For example, one of source phrases is "red fox". In an embodiment, the TRM 106 computes a digest "43521 aecac4af1159de3d45134d0c857" for the source phrase "red fox" using an MD5 hash function. Additionally, the TRM 106 indexes the one or more encrypted records in the phrase table based on the first digest for each of the one or more source phrases. In an embodiment, the TRM 106 sorts the one or more encrypted records in the phrase table based on the value of the first digests.

[0039] Thereafter, the TRM 106 transmits the phrase table, including the one or more encrypted records and the first digest for each of the one or more source phrases to the first computing device 102 (depicted by 206). Further, the TRM 106 transmits the first set of keys to the second computing device 108 (depicted by 208).

[0040] The first computing device 102 generates at least one query that includes a phrase in a first language. In an embodiment, the phrase has to be translated to a second language. The first computing device 102 computes a second digest for the query. In an embodiment, the first computing device 102 uses the same cryptographic hash function as utilized by the TRM 106 to generate the second digest (depicted by 210).

[0041] Thereafter, the first computing device 102 searches for the second digest in the first digest for each of the one or more source phrases (depicted by 212) to determine whether the phrase in the query is present in the one or more source phrases. In an embodiment, the first computing device utilizes one or more searching techniques such as, but not limited to, binary search, and hash table indexing to search for the second digest. If the second digest matches with at least one of the first digests, the phrase in the query is present in the one or more source phrases. Thereafter, the first computing device 102 extracts an encrypted record corresponding to the first digest that is equal to the second digest.

[0042] The first computing device 102 requests for a key from the second computing device 108 (depicted by 214). In an embodiment, the first computing device 102 sends a record number, associated with the at least one encrypted record, to the second computing device 108. Based on the record number, the second computing device 108 determines the key from the first set of keys. Thereafter, the second computing device 108 transmits the key to the first computing device 102 (depicted by 216). Concurrently, the second computing device 108 updates and transmits a log to the TRM 106.

[0043] The first computing device 102 decrypts the at least one encrypted record using the key received from the second computing device 108 (depicted by 218).

[0044] FIG. 3 is another message flow diagram 300 illustrating the flow of messages/data between the various components of the system environment 100 in accordance with at least one embodiment. The message flow diagram 300 is described in conjunction with FIG. 1.

[0045] The TRM 106 (refer FIG. 1) encrypts one or more records in a phrase table using a first key (depicted by 302) to generate one or more encrypted records. Thereafter, the TRM 106 compiles a decoder module that includes a decryption key (depicted by 304). The TRM 106 transmits the decoder module to the first computing device 102. The first computing device 102 installs the decoder module (depicted by 306).

[0046] The first computing device 102 generates a query that includes a phrase to be translated to a second language. In an embodiment, a user of the first computing device 102 inputs the query through the first computing device 102. In an alternate embodiment, the user of the first computing device 102 inputs the phrase through the first computing device 102. In an embodiment, the first computing device 102 utilizes the decoder module to generate the query. The first computing device 102 transmits the query to the TRM 106 (depicted by 308).

[0047] On receiving the query, the TRM 106 extracts at least one encrypted record from the one or more encrypted records in the phrase table. The TRM 106 transmits the at least one encrypted record to the first computing device 102 (depicted by 310).

[0048] The decoder module in the first computing device 102 decrypts the at least one encrypted record using the decryption key (depicted by 312).

[0049] FIG. 4 is yet another message flow diagram 400 illustrating the flow of messages/data between the various components of the system environment 100 in accordance with at least one embodiment. The message flow diagram 400 is described in conjunction with FIG. 1.

[0050] The TRM 106 (refer FIG. 1) encrypts one or more records in the phrase table using a first set of keys to generate one or more encrypted records (depicted by 402). In an embodiment, the TRM 106 encrypts all the records of the phrase table using the first set of keys. Further, the TRM 106 computes a first digest for each of the one or more source phrases in the phrase table using a cryptographic hash function (depicted by 404). Additionally, the TRM 106 indexes the one or more records in the phrase table based on the first digest for each of the one or more source phrases.

[0051] The TRM 106 further encrypts the first set of keys with a second key to generate first set of encrypted keys (depicted by 406). Based on the second key, the TRM 106 compiles a decoder module that includes the decryption key for the second key (depicted by 408).

[0052] Thereafter, the TRM 106 transmits the phrase table (including the one or more encrypted records), the decoder module, and the first digest for each of the one or more source phrases to the first computing device 102 (depicted by 410). Further, the TRM 106 transmits the first set of encrypted keys to the second computing device 108 (depicted by 412).

[0053] The first computing device 102 generates a query that includes a phrase to be translated in the second language (depicted by 414). The first computing device 102 computes a second digest for the query using the same cryptographic hash function that was used by the TRM 106 to generate the first digest (depicted by 416). Thereafter, the first computing device 102 searches for the second digest in the first digest for each of the one or more source phrases to determine whether the phrase is present in the one or more source phrases (depicted by 418). If the phrase is present in the one or more source phrases, the first computing device 102 extracts a corresponding the at least one encrypted record from the phrase table.

[0054] The first computing device 102 sends a request to the second computing device 108 for a key to decrypt the at least one encrypted record (depicted by 420). In an embodiment, the first computing device 102 transmits a record number associated with the at least one encrypted record in the phrase table. Based on the record number, the second computing device 108 determines an encrypted key from the first set of encrypted keys. The second computing device 108 transmits the encrypted key to the first computing device 102 (depicted by 422).

[0055] The first computing device 102 decrypts the encrypted key using the decoder module to obtain the key (depicted by 424). Thereafter, the first computing device 102 decrypts the encrypted record to obtain the translated phrase for the phrase in the first language (depicted by 426).

[0056] In an embodiment, the first computing device 102 deletes the key and the translated phrase.

[0057] In an alternate embodiment, the TRM 106 concatenates a random bit string to each of the one or more source phrases prior to computation of the first digest to generate salted source phrases. Concurrently, the TRM 106 generates a table that includes entries of the random bit string. The TRM 106 transmits the table and the first digest for each of the one or more salted source phrases to the first computing device 102. Additionally, the TRM 106 transmits the first set of encrypted keys and the first digests to the second computing device 108. In an embodiment, the TRM 106 indexes the first set of encrypted keys based on the first digests.

[0058] The first computing device 102 generates the query that includes the phrase to be translated. The first computing device 102 utilizes the table, received from the TRM 106, to concatenate the phrase with the random bit string to generate a salted phrase. The first computing device 102 computes the second digest for the salted phrase. Thereafter, the first computing device 102 searches for the second digest in the first digest for each of the one or more salted phrases. If the second digest is found in the first digest, the first computing device 102 extracts corresponding encrypted record. Further, the first computing device 102 transmits the second digest to the second computing device 108.

[0059] The second computing device 108 extracts and transmits the first set of encrypted key to the first computing device 102. Thereafter, the first computing device 102 decrypts the encrypted records as described above in message flow diagram 400.

[0060] Since, the second computing device 108 receives a second digest that has been derived from a salted phrase; the second computing device 108 won't be able to decode the second digest using techniques such as 'rainbow table'.

[0061] A person having ordinary skills would understand that the embodiment described above in conjunction with message flow diagram 400 would also be applicable to the message flow diagram 200, flowchart 1000 (described below), and flowchart 1200 (described below).

[0062] FIG. 5 is a block diagram of the TRM 106 in accordance with at least one embodiment. The TRM 106 includes a first processor 502, a first transceiver 504, and a first memory device 506.

[0063] The first processor 502 is coupled to the first transceiver 504 and the first memory device 506. The first processor 502 executes a set of instructions stored in the first memory device 506. The first processor 502 can be realized through a number of processor technologies known in the art. Examples of the first processor 502 can be, but are not limited to, X86 processor, RISC processor, ASIC processor, CISC processor, or any other processor.

[0064] The first transceiver 504 transmits and receives messages and data to/from the various components (e.g. the first computing device 102, the second computing device 108) of the system environment 100 (refer FIG. 1). Examples of the first transceiver 504 can include, but are not limited to, an antenna, an Ethernet port, a USB port or any port that can be configured to receive and transmit data from external sources. The first transceiver 504 transmits and receives data/ messages in accordance with various communication protocols, such as, Transmission Control Protocol and Internet Protocol (TCP/IP), User Datagram Protocol (UDP), 2G, 3G and 4G communication protocols.

[0065] The first memory device 506 stores a set of instructions and data. Some of the commonly known memory implementations can be, but are not limited to, random access memory (RAM), read only memory (ROM), hard disk drive (HDD), and secure digital (SD) card. The first memory device 506 includes a first program module 508 and a first program data 510. The first program module 508 includes a set of instructions that can be executed by the first processor 502 to perform one or more operations on the TRM 106. The first program module 508 includes a phrase table manager 512, a first communication manager 514, a compiling module 516, a first encryption module 518, a counter module 520, and a key manager 522. Although, various modules in the first program module 508 have been shown in separate blocks, it may be appreciated that one or more of the modules may be implemented as an integrated module performing the combined functions of the constituent modules.

[0066] The first program data 510 includes a first phrase table data 524, a decoder source data 526, a first query data 528, a first key data 530, and a log data 532.

[0067] The phrase table manager 512 maintains and updates one or more phrase tables. Further, the phrase table manager 512 stores the one or more phrase tables as the first phrase table data 524. In an embodiment, the phrase table manager 512 extracts one or more records from at least one of the one or more phrase tables based on a query received from the first computing device 102. In an embodiment, the phrase table manager 512 uses one or more querying languages to extract one or more records from the at least one phrase table. Some examples of such querying languages include, but are not limited to, SQL, OQL (Object query language), QUEL, CQL (Context query language), etc.

[0068] In an embodiment, the first phrase table data 524 may be stored on a database (not shown) that is external to the TRM 106.

[0069] The first communication manager 514 receives one or more queries from the first computing device 102 through the first transceiver 504. In an embodiment, the first communication manager 514 transmits the one or more records of the at least one phrase table to the first computing device 102. The first communication manager 514 includes various protocol stacks such as, but not limited to, Transmission Control Protocol and Internet Protocol (TCP/IP), User Datagram Protocol (UDP), 2G, 3G or 4G communication protocols. The first communication manager 514 transmits and receives the messages/data through the first transceiver 504 in accordance with such protocol stacks.

[0070] In an embodiment, the compiling module 516 utilizes the decoder source data 526 to compile a decoder module. In an embodiment, the compiling module 516 embeds a decryption key in the decoder module while compiling the decoder module. In an embodiment, the first communication manager 514 transmits the compiled decoder module to the first computing device 102. The compiling module 516 may utilize various compilers, such as, but not limited to, GCC, G++, or Visual studio compiler to compile the decoder module.

[0071] The first encryption module 518 encrypts one or more records in the at least one phrase table using the first set of keys to generate one or more encrypted records. In an alternate embodiment, the first encryption module 518 encrypts each key in the first set of keys using the second key. The first encryption module 518 further generates the first digest for each of the one or more source phrases in the at least one phrase table using one or more cryptographic hash functions. The first encryption module 518 stores the one or more encrypted records and the first digest for each of the one or more source phrases as the first phrase table data 224.

[0072] The counter module 520 creates and maintains the log indicative of the usage of keys in the first set of keys. The counter module 520 stores the log as the log data 532.

[0073] The key manager 522 manages and maintains various keys being utilized by the first encryption module 518 to encrypt the one or more records in the phrase table. The key manager 522 stores the various keys as the first key data 530.

[0074] The operation of the TRM 106 is described in conjunction with FIG. 6, FIG. 7 and FIG. 8.

[0075] FIG. 6 is a flowchart 600 illustrating a method implemented on the TRM 106 in accordance with at least one embodiment. The flowchart 600 is described in conjunction with FIG. 1 and FIG. 5.

[0076] At step 602, the one or more records in at least one phrase table are encrypted using the first set of keys. In an embodiment, the first encryption module 518 (refer FIG. 5) encrypts the one or more records in the phrase table. Prior to the encryption, the first encryption module 518 extracts the at least one phrase table from the first phrase table data 524. Thereafter, the first encryption module 518 encrypts the one or more records in the at least one phrase table to generate one or more encrypted records. In an embodiment, the first encryption module 518 encrypts all the records in the phrase table with the first set of keys.

[0077] At step 604, a first digest is computed for each of the one or more source phrases in the at least one phrase table using a cryptographic hash function. In an embodiment, the first encryption module 518 computes the first digest for each of the one or more source phrases. Post the computation of the first digest, the phrase table manager 512 indexes the one or more encrypted records in the at least one phrase table based on the first digest for each of the one or more source phrases such that digests for each of the one or more source phrases correspond to the respective encrypted records.

[0078] At step 606, the one or more encrypted records and the first digest for each of the one or more source phrases are transmitted to the first computing device 102 (refer FIG. 1). In an embodiment, the first communication manager 514 transmits the one or more encrypted records and the first digest to the first computing device 102.

[0079] At step 608, the first set of keys is transmitted to the second computing device 108. In an embodiment, the first communication manager 514 transmits the first set of keys to the second computing device 108.

[0080] FIG. 7 is another flowchart 700 illustrating a method implemented on a TRM 106 in accordance with at least one embodiment. The flowchart 700 is described in conjunction with FIG. 1 and FIG. 5.

[0081] At step 702, the one or more records in at least one phrase table are encrypted using a second key to generate one or more encrypted records. In an embodiment, the first encryption module 518 (refer FIG. 5) encrypts the one or more records in the phrase table using the second key.

[0082] At step 704, a decoder module is compiled based on the second key. In an embodiment, the compiling module 516 compiles the decoder module based on the second key. Prior to the compiling of the decoder module, the key manager 522 generates a decryption key for the second key. Further, the key manager 522 stores the decryption key as the first key data 530. The compiling module 516 utilizes the decryption key to compile the decoder module. In an embodiment, the compiling module 516 embeds the decryption key in the decoder source data 526 so that while compiling the decoder source data 526, the decryption key gets embedded in the decoder module.

[0083] At step 706, the decoder module is transmitted to the first computing device 102. In an embodiment, the first communication manager 514 transmits the decoder module to the first computing device 102 (refer FIG. 1).

[0084] At step 708, a query to access the phrase table is received from the first computing device 102. In an embodiment, the first communication manager 514 receives the query from the first computing device 102 through the first transceiver 504. The first communication manager 514 stores the query as the first query data 528. The phrase table manager 512 utilizes the query from the first query data 528 to extract at least one encrypted record from the phrase table.

[0085] At step 710, the at least one encrypted record is transmitted to the first computing device 102. In an embodiment, the first communication manager 514 transmits the at least one encrypted record to the first computing device 102.

[0086] FIG. 8 is yet another flowchart 800 illustrating a method implemented on a TRM 106 in accordance with at least one embodiment. The flowchart 800 is described in conjunction with FIG. 1 and FIG. 5.

[0087] At step 802, one or more records in at least one phrase table are encrypted with the first set of keys to generate the one or more encrypted records. In an embodiment, the first encryption module 518 (refer FIG. 5) encrypts the one or more records. In an embodiment, the first encryption module 518 encrypts all the records in the phrase table with the first set of keys.

[0088] At step 804, a first digest is computed for each of one or more source phrases in the at least one phrase table using a cryptographic hash function. In an embodiment, the first encryption module 518 computes the first digest for each of the one or more source phrases.

[0089] At step 806, the first set of keys is encrypted with a second key to generate a first set of encrypted keys. In an embodiment, the first encryption module 518 (refer FIG. 5) encrypts the first set of encrypted keys with the second key.

[0090] At step 808, a decoder module is compiled based on the second key. In an embodiment, the compiling module 516 compiles the decoder module based on the second key. In an embodiment, the decoder module includes a decryption key for the second key. The process of compiling the decoder module has been previously described at step 704 in the flowchart 700.

[0091] At step 810, the decoder module, the phrase table (including the one or more encrypted records), and the first digest for each of the one or more source phrases are transmitted to the first computing device 102 (refer FIG. 1). In an embodiment, the first communication manager 514 transmits the decoder module, the phrase table, and the first digest to the first computing device 102 through the first transceiver 504.

[0092] At step 812, the first set of encrypted keys is transmitted to the second computing device 108. In an embodiment, the first communication manager 514 transmits the first set of encrypted keys to the second computing device 108.

[0093] FIG. 9 is a block diagram of the first computing device 102 at client side in accordance with at least one embodiment. The first computing device 102 includes a second processor 902, a second transceiver 904, and a second memory device 906. The first computing device 102 is described in conjunction with FIG. 1.

[0094] The second processor 902 executes a set of instructions stored in the second memory device 906. The second processor 902 can be realized through a number of processor technologies known in the art. Examples of the second processor 902 can include, but is not limited to, X86 processor, RISC processor, ASIC processor, CSIC processor, ARM processor, or any other processor.

[0095] The second transceiver 904 is similar to the first transceiver 504 in the TRM 106 with respect to function, and structure. Further, all the embodiments applicable to the first transceiver 504 are also applicable to the second transceiver 904.

[0096] The second memory device 906 is similar to the first memory device 506 in the TRM 106 with respect to function, and structure. Further, the embodiments applicable to the first memory device 506 are also applicable to the second memory device 906. The second memory device 906 includes a second program module 908 and a second program data 910. The second program module 908 includes a query manager 912, a second communication manager 914, a second encryption module 916, a search module 918, a decryption module 920, and a decoder module 922.

[0097] The second program data 910 includes a second phrase table data 924, a second key data 926, a second query data 928, and a digest data 930.

[0098] The query manager 912 generates a query that includes a phrase in a first language that is to be translated to a second language. In an embodiment, the query manager 912 extracts at least one encrypted record from a phrase table in the second phrase table data 924 based on the query. The query manager 912 stores the query as the second query data 928. In an embodiment, the query manager 912 generates the one or more queries in accordance with one or more querying languages such as SQL, OQL, and QUEL.

[0099] In an embodiment, the second communication manager 914 receives the phrase table (includes one or more encrypted records), and/or a first digest for each of the one or more source records from the TRM 106. The second communication manager 914 stores the phrase table and the first digest as the second phrase table data 924. Further, the second communication manager 914 receives a first set of keys from the second computing device 108. The second communication manager 914 stores the first set of keys as the second key data 926.

[0100] In an alternate embodiment, the second communication manager 914 receives the decoder module 922 from the TRM 106. In yet another embodiment, the second communication manager 914 transmits the query to the TRM 106. Further, the second communication manager 914 receives at least one encrypted record from the TRM 106 in response to the query.

[0101] The second communication manager 914 includes various protocol stacks such as, but not limited to, Transmission Control Protocol and Internet Protocol (TCP/IP), User Datagram Protocol (UDP), 2G, 3G or 4G communication protocols. The second communication manager 914 transmits and receives the messages/data through the second transceiver 904 in accordance with such protocol stacks.

[0102] In an embodiment, the second encryption module 916 generates a second digest for the query using one or more cryptographic hash functions. In an embodiment, the second encryption module 916 utilizes the same cryptographic hash function that was utilized by the TRM 106 to generate the first digest. The second encryption module 916 stores the second digest as the digest data 930.

[0103] In an embodiment, the search module 918 searches for the second digest in the first digest for each of the one or more source phrases to determine whether the phrase in the query is present in the one or more source phrases in the phrase table. In an embodiment, the search module 918 utilizes one or more searching techniques such as binary search and hash table indexing to search for the second digest.

[0104] In an embodiment, the decryption module 920 utilizes the first set of keys, in the second key data 926, to decrypt the at least one encrypted record extracted from the phrase table in the second phrase table data 924.

[0105] The decoder module 922 utilizes a decryption key to decrypt the at least one encrypted record received from the TRM 106. In an embodiment, the decoder module 922 includes a decryption key.

[0106] The operation of the first computing device 102 is described in conjunction with FIG. 10, FIG. 11, and FIG. 12.

[0107] FIG. 10 is a flowchart 1000 illustrating a method implemented on the first computing device 102 at client end in accordance with at least one embodiment.

[0108] At step 1002, a phrase table (including one or more encrypted records) is received from the TRM 106 (refer FIG.1). In an embodiment, the second communication manager 914 (refer FIG.9) receives the phrase table from the TRM 106. The second communication manager 914 stores the phrase table as the phrase table data 924.

[0109] At step 1004, a first digest for each of the one or more source phrases is received from the TRM 106. In an embodiment, the second communication manager 914 receives the phrase table from the TRM 106. In an embodiment, the one or more encrypted records in the phrase table have been indexed by the TRM 106 based on the first digest.

[0110] At step 1006, a query to access one or more encrypted records in the phrase table is generated. In an embodiment, the query manager 912 generates the query. In an embodiment, the query includes a phrase in a first language that is to be translated.

[0111] At step 1008, a second digest is computed for the query using one or more cryptographic functions. In an embodiment, the second encryption module 916 computes the second digest. In an embodiment, the second encryption module 916 uses one or more cryptographic functions used by the TRM 106 to generate the first digest.

[0112] At step 1010, the second digest is searched in the first digest for each of the one or more source phrases, to determine whether the phrase in the query is present in the one or more source phrases. In an embodiment, the search module 918 searches for the second digest.

[0113] At step 1012, a check is performed whether the second digest is found in at least one of the first digests. In an embodiment, the search module 918 performs the check. If at step 1012 it is determined that the second digest is equal to the first digest, then the phrase in query is present in the one or more source phrases and step 1014 is performed.

[0114] At step 1014, a first key is received from the second computing device 108. In an embodiment, the second communication manager 914 receives the first key. Prior to receiving the first key, the query manager 912 extracts at least one encrypted record from the phrase table based on the query. In an embodiment, the at least one encrypted record corresponds to a first digest (equal to the second digest) determined at step 1012. Thereafter, the second communication manager 914 transmits a request for the first key to the second computing device 108. In an embodiment, the request includes a record number associated with of the at least one encrypted record.

[0115] At step 1016, the at least one encrypted record is decrypted using the first key. In an embodiment, the decryption module 920 decrypts the at least one record.

[0116] If at step 1012, it is determined that the second digest is not equal to any of the first digests, the search module 918 draws an inference that the phrase table in the second phrase table data 924 does not include the translation for the phrase in the query.

[0117] FIG. 11 is another flowchart 1100 illustrating a method implemented on the first computing device 102 at client end in accordance with at least one embodiment.

[0118] At step 1102, the decoder module 922 (refer FIG. 9) is received from the TRM 106. In an embodiment, the second communication manager 914 receives the decoder module 922 from the TRM 106. In an embodiment, the decoder module 922 includes a decryption key.

[0119] At step 1104, a query, including a phrase to be translated, is generated. In an embodiment, the query manager 912 generates the query.

[0120] At step 1106, the query is transmitted to the TRM 106 (refer FIG. 1). In an embodiment, the second communication manager 914 transmits the query to the TRM 106.

[0121] At step 1108, at least one encrypted record is received from the TRM 106 in response to the query. In an embodiment, the second communication manager 914 receives the at least one encrypted record.

[0122] At step 1110, the at least one encrypted record is decrypted by the decoder module 922 using the decryption key.

[0123] FIG. 12 is yet another flowchart 1200 illustrating a method implemented on the first computing device 102 at client end in accordance with at least one embodiment.

[0124] At step 1202, the decoder module 922 is received from the TRM 106. In an embodiment, the second communication manager 914 receives the decoder module 922 from the TRM 106. In an embodiment, the decoder module 922 includes a decryption key.

[0125] At step 1204, a phrase table (including one or more encrypted records) is received from the TRM 106. In an embodiment, the second communication manager 914 receives the phrase table from the TRM 106. The second communication manager 914 stores the phrase table as the second phrase table data 924.

[0126] At step 1206, a first digest for each of the one or more source phrases is received from the TRM 106. In an embodiment, the second communication manager 914 receives the phrase table from the TRM 106. In an embodiment, the one or more encrypted records in the phrase table have been indexed by the TRM 106 based on the first digest.

[0127] At step 1208, a query to access one or more encrypted records in the phrase table is generated. In an embodiment, the query manager 912 generates the query. In an embodiment, the query includes a phrase in a first language that is to be translated.

[0128] At step 1210, a second digest is computed for the query using one or more cryptographic function. In an embodiment, the second encryption module 916 computes the second digest. In an embodiment, the second encryption module 916 uses the same one or more cryptographic function as used by the TRM 106 to generate the first digest.

[0129] At step 1212, the second digest is searched in the first digest for each of the one or more source phrases, to determine whether the phrase in the query is present in the one or more source phrases. In an embodiment, the search module 918 searches for the second digest.

[0130] At step 1214, a check is performed whether the second digest is equal to at least one of the first digest for the one or more source phrase. In an embodiment, the search module 918 performs the check. If at step 1012 it is determined that the second digest is equal to the first digest, then the phrase in query is present in the one or more source phrases and step 1216 is performed.

[0131] At step 1216, a first encrypted key is received from the second computing device 108. In an embodiment, the second communication manager 914 receives the first encrypted key. Prior to receiving the first encrypted key, the query manager 912 extracts at least one encrypted record from the phrase table in the second phrase table data 924 based on the query. In an embodiment, the at least one encrypted record corresponds to a first digest (equal to the second digest) determined at step 1214. Thereafter, the second communication manager 914 transmits a request for a first key to the second computing device 108. In an embodiment, the request includes the record number associated with the at least one encrypted record.

[0132] At step 1218, the first encrypted key is decrypted using the decryption key in the decoder module 922 to generate a first key.

[0133] At step 1220, the at least one encrypted record is decrypted using the first key. In an embodiment, the decryption module 920 decrypts the at least one encrypted record.

[0134] If at step 1214, it is determined that the second digest is not equal to any of the first digest, the search module 918 draws an inference that the phrase table in the second phrase table data 924 does include the translation for the phrase in the query.

[0135] From the disclosed embodiment, it is observed that the first computing device 102 receives the phrase table (including the one or more encrypted records) from the TRM 106. The first computing device 102 further receives a decoder module 922. Since, the first computing device 102 has the phrase table; there is no need to transmit the query to the TRM 106.

[0136] Further, from the disclosed embodiments it is observed that the first computing device 102 receives an encrypted key to decrypt the one or more encrypted records in the phrase table. The decoder module 922 decrypts the encrypted key to generate a key that is utilized by the first computing device 102 to decrypt an encrypted record. Since, the first computing device 102 cannot utilize the encrypted key to decrypt the encrypted record; the first computing device 102 cannot determine all the records in the phrase table.

[0137] The disclosed methods and systems, as illustrated in the ongoing description or any of its components, may be embodied in the form of a computer system. Typical examples of a computer system include a general-purpose computer, a programmed microprocessor, a micro-controller, a peripheral integrated circuit element, and other devices, or arrangements of devices that are capable of implementing the steps that constitute the method of the disclosure.

[0138] The computer system comprises a computer, an input device, a display unit and the Internet. The computer further comprises a microprocessor. The microprocessor is connected to a communication bus. The computer also includes a memory. The memory may be Random Access Memory (RAM) or Read Only Memory (ROM). The computer system further comprises a storage device, which may be a hard-disk drive or a removable storage drive, such as, a floppy-disk drive, optical-disk drive, etc. The storage device may also be a means for loading computer programs or other instructions into the computer system. The computer system also includes a communication unit. The communication unit allows the computer to connect to other databases and the Internet through an Input/output (I/O) interface, allowing the transfer as well as reception of data from other databases. The communication unit may include a modem, an Ethernet card, or other similar devices, which enable the computer system to connect to databases and networks, such as, LAN, MAN, WAN, and the Internet. The computer system facilitates inputs from a user through input device, accessible to the system through an I/O interface.

[0139] The computer system executes a set of instructions that are stored in one or more storage elements, in order to process input data. The storage elements may also hold data or other information, as desired. The storage element may be in the form of an information source or a physical memory element present in the processing machine.

[0140] The programmable or computer readable instructions may include various commands that instruct the processing machine to perform specific tasks such as, steps that constitute the method of the disclosure. The method and systems described can also be implemented using only software programming or using only hardware or by a varying combination of the two techniques. The disclosure is independent of the programming language and the operating system used in the computers. The instructions for the disclosure can be written in all programming languages including, but not limited to, 'C', 'C++', 'Visual C++' and 'Visual Basic'. Further, the software may be in the form of a collection of separate programs, a program module containing a larger program or a portion of a program module, as discussed in the ongoing description. The software may also include modular programming in the form of object-oriented programming. The processing of input data by the processing machine may be in response to user commands, results of previous processing, or a request made by another processing machine. The disclosure can also be implemented in all operating systems and platforms including, but not limited to, 'Unix', 'DOS', 'Android', 'Symbian', and 'Linux'.

[0141] The programmable instructions can be stored and transmitted on a computer-readable medium. The disclosure can also be embodied in a computer program product comprising a computer-readable medium, or with any product capable of implementing the above methods and systems, or the numerous possible variations thereof.

[0142] Various embodiments of the disclosure titled "methods and systems for securely accessing translation resource manager" have been disclosed. However, it should be apparent to those skilled in the art that many more modifications, besides those described, are possible without departing from the inventive concepts herein. The embodiments, therefore, are not to be restricted, except in the spirit of the disclosure. Moreover, in interpreting the disclosure, all terms should be understood in the broadest possible manner consistent with the context. In particular, the terms "comprises" and "comprising" should be interpreted as referring to elements, components, or steps, in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced.

[0143] A person having ordinary skills in the art will appreciate that the system, modules, and sub-modules have been illustrated and explained to serve as examples and should not be considered limiting in any manner. It will be further appreciated that the variants of the above disclosed system elements, or modules and other features and functions, or alternatives thereof, may be combined to create many other different systems or applications.

[0144] Those skilled in the art will appreciate that any of the aforementioned steps and/or system modules may be suitably replaced, reordered, or removed, and additional steps and/or system modules may be inserted, depending on the needs of a particular application. In addition, the systems of the aforementioned embodiments may be implemented using a wide variety of suitable processes and system modules and is not limited to any particular computer hardware, software, middleware, firmware, microcode, etc.


Claims

1. A computer implemented method of providing a secure access to a phrase table, the computer implemented method comprising:

encrypting one or more records in the phrase table to generate one or more encrypted records, wherein the phrase table facilitates translation of a first phrase from a first language to a second language, wherein one or more records comprises at least a phrase in the second language; and

transmitting the one or more encrypted records to a first computing device.


 
2. The computer implemented method of claim 1, wherein the one or more records are encrypted using a first set of keys.
 
3. The computer implemented method of claim 2, further comprising:

computing a first digest for each of one or more source phrases in the phrase table based on a cryptographic function, wherein the one or more source phrases comprises at least a phrase in the first language;

transmitting the first digest to the first computing device; and

transmitting the first set of keys to a second computing device.


 
4. The computer implemented method of claim 2 or claim 3, further comprising:

encrypting the first set of keys with a second key to generate a first set of encrypted keys;

compiling a decoder module based on the second key;

computing a first digest for each of one or more source phrases in the phrase table based on a cryptographic function, wherein the one or more source phrases comprises at least a phrase in the first language;

transmitting the decoder module, and the first digest to the first computing device; and

transmitting the first set of encrypted keys to a second computing device.


 
5. The computer implemented method of any of the preceding claims, wherein the one or more records are encrypted using a second key.
 
6. The computer implemented method of claim 5, further comprising:

compiling a decoder module based on the second key; and

transmitting the decoder module to the first computing device;

receiving a query from the first computing device, the query including at least a phrase in the first language to be translated in the second language; and

determining the one or more encrypted records based on the query.


 
7. A computer implemented method of securely accessing a phrase table, the computer implemented method comprising:

generating a query to access one or more encrypted records in the phrase table, wherein the phrase table facilitates translation of a first phrase from a first language to a second language, the query comprising the first phrase in the first language, wherein the one or more encrypted records comprises at least a phrase in the second language.


 
8. The computer implemented method of claim 7, further comprising:

receiving the phrase table from a first computing device, the phrase table including the one or more encrypted records;

receiving a first digest for each of one or more source phrases in the phrase table, wherein the first digest is computed based on a cryptographic function, wherein the one or more source phrases comprises at least a phrase in the first language;

computing a second digest for the query based on the cryptographic function;

searching for the second digest in the first digest for each of the one or more source phrases;

receiving a first set of keys from a second computing device based on the searching; and

decrypting the one or more encrypted records based on the first set of keys.


 
9. The computer implemented method of claim 7 or claim 8, further comprising:

receiving a decoder module from a first computing device, wherein the decoder module includes a decryption key;

transmitting the query to the first computing device;

receiving the one or more encrypted records based on the query; and

decrypting the one or more encrypted records based on the decryption key in the decoder module.


 
10. The computer implemented method of claim 7 or claim 8, further comprising:

receiving a decoder module from a first computing device, wherein the decoder module includes a decryption key;

receiving the phrase table from the first computing device, the phrase table including the one or more encrypted records;

receiving a first digest for each of one or more source phrases in the phrase table, wherein the first digest is computed based on a cryptographic function, the one or more source phrases comprising at least a phrase in the first language;

computing a second digest for the query based on the cryptographic function;

searching for the second digest in the first digest for each of the one or more source phrases;

receiving a first set of encrypted keys from a second computing device based on the searching;

decrypting the first set of encrypted keys based on the decryption key to generate a first set of keys; and

decrypting the one or more encrypted records based on the first set of keys.


 
11. The computer implemented method of claim 9 or claim 10, wherein the decoder module deletes the first set of keys and the one or more decrypted records.
 
12. A Translation Resource Manager (TRM) comprising a set of instructions executable by a processor, the set of instructions comprising:

an encryption module configured to encrypt one or more records in a phrase table to generate one or more encrypted records, wherein the phrase table facilitates translation of a first phrase from a first language to a second language, wherein the one or more records comprises at least a phrase in the second language; and

a communication manager configured to transmit the one or more encrypted records through a transceiver to a first computing device.


 
13. A TRM according to claim 12, wherein the communication manager is adapted to carry out a method according to any of claims 1 to 6.
 
14. A computing device for securely accessing a phrase table, the computing device comprising:

a query manager configured to generate a query to access one or more encrypted records in the phrase table, wherein the phrase table facilitates translation of a first phrase from a first language to a second language, the query comprising the first phrase in the first language, wherein the one or more encrypted records comprises at least a phrase in the second language.


 
15. A computing device according to claim 14 adapted to carry out a method according to any of claims 7 to 11.
 




Drawing