| 摘要 |
The invention concerns a transmission method between a first module (25) and a second module (26) comprising the following steps: in the first module (25): calculating y such that y = g &cir& x mod (p), g and x being the random numbers preserved in the terminal, p being a prime number, g and p being known to the two modules; transmitting (38) the value y to the second module; in the second module (26): retrieving (32) the value y; generating (30) a random variable k; calculating (31) two values A and B, such that A = g &cir& k mod (p) B = y &cir& k.M mod (p), M being a known message to be transmitted in encrypted form; transmitting (34) values A and B to the first module (25); in the first module (25): retrieving (36) the message M using the following formula: M = B/(A &cir& x)mod (p). |
