DEVICE AUTHENTICATION SYSTEM, TERMINAL DEVICE, AUTHENTICATION SERVER, SERVICE SERVER, TERMINAL DEVICE METHOD, AUTHENTICATION METHOD, TERMINAL DEVICE PROGRAM, AUTHENTICATION PROGRAM, SERVICE SERVER PROGRAM, AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To connect a device authentication module with an encryption module by a dynamic link in a CE device.;SOLUTION: An authentication server 5 generates a random number. A device authentication module 7 creates a digest by combining a path phrase with this random number and transmits the digest and the device ID to an encryption module 8. The encryption module encrypts the communication path and transmits these information to an authentication server 5. The authentication server 5 searches the path phrase from the device ID and combines this with the previously generated random number, thereby creating a digest. This digest is compared with the digest received from the encryption module 8, thereby performing device authentication. The encryption module 8 can be connected by a dynamic link instead of a static link so as to receive a digest instead of a path phrase from the device authentication module 7.;COPYRIGHT: (C)2005,JPO&NCIPI