AUTHENTICATION DEVICE, AUTHENTICATED DEVICE, AUTHENTICATION METHOD, AUTHENTICATED METHOD, AUTHENTICATION PROCESSING PROGRAM, AND AUTHENTICATED PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an authentication device, authenticated device, authentication method, authenticated method, authentication processing program, and authenticated processing program that can improve safety against spoofing or the like even if an attacker stores pairs of a challenge and a response.SOLUTION: A communication device T1 and a communication device T2 have stored the same random number table, safely update the random number table on a timely basis by only transmitting and receiving an index, and furthermore hand over a challenge value by index.SELECTED DRAWING: Figure 4