Global Patent Index - EP 1040620 A1

EP 1040620 A1 2000-10-04 - METHOD FOR MAKING SECURE THE TRANSMISSION OF A MESSAGE FROM A TRANSMITTING DEVICE TO A RECEIVING DEVICE

Title (en)

METHOD FOR MAKING SECURE THE TRANSMISSION OF A MESSAGE FROM A TRANSMITTING DEVICE TO A RECEIVING DEVICE

Title (de)

VERFAHREN ZUR SICHERUNG DER ÜBERTRAGUNG EINER NACHRICHT VON EINER SENDEVORRICHTUNG ZU EINER EMPFANGSVORRICHTUNG

Title (fr)

PROCEDE DE SECURISATION DE LA TRANSMISSION D'UN MESSAGE D'UN DISPOSITIF EMETTEUR A UN DISPOSITIF RECEPTEUR

Publication

EP 1040620 A1 (FR)

Application

EP 98962482 A

Priority

  • FR 9802753 W
  • FR 9715971 A

Abstract (en)

[origin: FR2772532A1] The invention concerns a method for making secure the transmission of a message (Prgm) from a transmitting device (E) to a receiving device (R), characterised in that: the message (Prgm) is split into n elementary units (I), n being a number not less than 1; a logical property (P) is defined such that, for each elementary unit (I), the logical property (P), applied to an authentic elementary unit (I), gives a true logical value; the message (Prgm) is encrypted by the transmitting device (E) encryption means using an encryption algorithm comprising a key (Kc) so as to obtain a result Kc(Pgrm); The encrypted result Kc(Pgrm) is transmitted by the transmitting device (E) to the receiving device (R); the encrypted result Kc(Pgrm) is decrypted by the receiving device (R) using a decryption algorithm comprising a secret key (Kd) so as to obtain a decrypted result Kd(Kc(Pgrm)); the decrypted result Kd(Kc(Pgrm)) is split into elementary units (I); the logical property (P) is applied to the elementary units (I) so as to obtain, for each unit, a true logical value or a false logical value. The method is particularly applicable to smart cards.

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

H04L 9/32; G06F 1/00; G06F 12/14

IPC 8 full level (invention and additional information)

G06K 19/07 (2006.01); G06F 1/00 (2006.01); G06F 21/60 (2013.01); G06K 17/00 (2006.01); G09C 1/00 (2006.01); H04L 9/10 (2006.01); H04L 9/32 (2006.01)

CPC (invention and additional information)

H04L 9/32 (2013.01); G06F 21/606 (2013.01); G06F 2211/007 (2013.01)

Citation (search report)

See references of WO 9931845A1

Designated contracting state (EPC)

DE ES FR GB

EPO simple patent family

FR 2772532 A1 19990618; FR 2772532 B1 20000107; CN 1284227 A 20010214; EP 1040620 A1 20001004; JP 2002509269 A 20020326; WO 9931845 A1 19990624

INPADOC legal status


2004-01-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030701

2000-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000523

2000-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB