MUTUAL AUTHENTICATION METHOD AND DEVICE OF SECRET INFORMATION INFRASTRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide mutual authentication method and device based on the security information.SOLUTION: A mutual authentication method in a vehicle controller interlocked with an external device includes a first step of generating a random number S by an authentication request message received from the external device, a second step of generating a variable i by using a first function where the random number S is a parameter, a third step of generating a first session key Kby using a second function where the variable i and a prestored security key K are parameters, a fourth step of receiving a first response key from the external device, a fifth step of generating a second response key by using a third function where the random number S, the variable i and the first session key Kare parameters, and a sixth step of authenticating the external device based on whether or not the first response key and second response key match each other.SELECTED DRAWING: Figure 2