ENCRYPTION PROCESSING DEVICE AND AUTHENTICATION METHOD

摘要

An encryption processing device includes a memory configured to store a common key, and a processor configured to generate a random number which is an integer, to perform a bit transposition on the common key, the bit transposition being determined at least by the random number, to transmit the random number to another encryption processing device and to receive a response from the other encryption processing device, the response obtained by encryption using a common key stored in the other encryption processing device and a second randomized key generated by performing the bit transposition determined by the random number; and to authenticate the other encryption processing device either by comparing the response with the random number by decrypting the response with the common key, or by comparing the random number with the response by encrypting the random number with the common key.

主权项

1. An encryption processing device comprising:
a memory configured to store a common key; and a processor configured to generate a random number which is an integer, to perform a bit transposition on the common key, the bit transposition being determined at least by the random number, to transmit the random number to another encryption processing device and to receive a response from the other encryption processing device, the response obtained by encryption using a common key stored in the other encryption processing device and a second randomized key generated by performing the bit transposition determined by the random number; and to authenticate the other encryption processing device either by comparing the response with the random number by decrypting the response with the common key, or by comparing the random number with the response by encrypting the random number with the common key.