Patent ID: 9124432
Filing Date: 2015-09-01
Classification: H04L

Abstract:
1. A host device assigned with identification key information and first key information, comprising: a first data generation unit that generates identification key information that may be decrypted from the identification key information using key management information read from an authenticatee; a decryption unit that decrypts encrypted secret identification information read from the authenticatee using the generated identification key information to generate secret identification information; a random number generator that generates a random number; a second data generation unit that generates a first session key using the first key information and the random number; a one-way conversion unit that performs a one-way conversion process on the secret identification information using the generated first session key to generate first one-way conversion data; and a verification unit that judges whether the first one-way conversion data and a second one-way conversion data received from the authenticatee match, when the judgment result of the verification unit is affirmative, a one-way conversion process being conducted on the secret identification information and secret information to generate one-way conversion identification information.