| 摘要 |
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. |
