Global Patent Index - EP 1099323 A1

EP 1099323 A1 2001-05-16 - ENCRYPTION AND DECRYPTION KEY ARRANGEMENTS

Title (en)

ENCRYPTION AND DECRYPTION KEY ARRANGEMENTS

Title (de)

VERSCHLÜSSELUNGSSCHLÜSSEL-ANORDNUNG

Title (fr)

DISPOSITIFS GENERANT DES CODES DE CHIFFREMENT ET DE DECHIFFREMENT

Publication

EP 1099323 A1 (EN)

Application

EP 99928133 A

Priority

  • GB 9902052 W
  • GB 9814003 A

Abstract (en)

[origin: WO0001110A1] An apparatus, arranged to encrypt or decrypt messages, is arranged to generate a session key of a variable selected number of characters and to distribute these characters in sequence into a predetermined number of groups to form a corresponding number of primitives: these primitives are used, in accordance with a predetermined algorithm, to form a cypher key stream the characters of which are used in sequence to encrypt or decrypt successive characters (or elements) of a message.

IPC 1-7 (main, further and additional classification)

H04L 9/08; G09C 1/00; H04L 9/22

IPC 8 full level (invention and additional information)

G09C 1/00 (2006.01); H04L 9/08 (2006.01); H04L 9/20 (2006.01)

CPC (invention and additional information)

H04L 9/088 (2013.01)

Citation (search report)

See references of WO 0001110A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

GB 2339121 A 20000112; GB 2339121 B 20030305; GB 9814003 D0 19980826; EP 1099323 A1 20010516; JP 2002519940 A 20020702; WO 0001110 A1 20000106

INPADOC legal status


2004-07-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040103

2001-05-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001208

2001-05-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT