Authentication device according to the challenge - response - principle

摘要

PROBLEM TO BE SOLVED: To provide a cryptographic equipment provided with a small scale cryptographic IC and having a required minimum function to ensure security for inter-equipment communication. ;SOLUTION: A 1st cryptographic IC 54 in a 1st equipment 51 combines a random number R3 generated in the process (steps 1, 3, 6, 7) to verify a 2nd equipment 52 with a random number RR4 acquired in the process (steps 2, 4, 5, 8) to prove its own validity to the 2nd equipment 52 so as to generate a time changing data transfer key (step 9) are digital literary works are cryptographer by using the data transfer key and the cryptographic data are transferred to the 2nd equipment 52 (step 11).;COPYRIGHT: (C)1998,JPO