Patent ID: 7681033
Filing Date: 2010-03-16
Classification: G06F,H04L

Abstract:
1. A device authentication system comprising a terminal device including confidential information for device authentication and an authentication server for granting device authentication to the terminal device using the confidential information, wherein the terminal device acquires a random number and random number identification information identifying the random number, and generates a conversion value by converting a set of the acquired random number and the confidential information using a one-way function; the authentication server acquires (i) the random number acquired by the terminal device, using the random number identification information acquired by the terminal device, (ii) the confidential information of the terminal device, and (iii) the conversion value generated by the terminal device; a conversion value is generated by the authentication server by converting the set of the acquired random number and the confidential information acquired by the authentication server using the same one-way function as that used by the terminal device; and the conversion value generated by the terminal device is compared with the conversion value generated by the authentication server.