| 摘要 |
In one aspect, the present invention relates to a method of cryptographic processing of a message, the method comprising: -establishing communication between a first communication unit and a second communication unit in a communication domain comprising a communication channel; -defining, by the second communication unit, an integer a as a first private key and a number KA as a first public key, the first public key being a number determined based on a prime integer p, a generator prime integer g and the first private key; -making the first public key KA available to the first communication unit; -causing the first and the second communication units to share the prime number p and the generator number g; defining, by the first communication unit, an integer b as a second private key and a number KB as a second public key, the second public key being a number determined based on the prime number p, the generator number g and the second private key; -determining by the first communication unit an encryption exponent x by means of the equation: {[KAb+eB](mod p)}*x=1 mod(p-1), where ê is a parameter selected from the group of integers, so that coprimeness of [KAb+eB](mod p) and (p-1) is verified; -providing a message T by the first communication unit; -coding the message T, where coding comprises dividing the message T into at least one message block M, and -encrypting by the first communication unit the at least one message block M, thereby obtaining at least one cryptogram C by the equation C=Mx(mod p). In a further aspect, the present invention relates to a system for cryptographic processing of a message. |
