DATA PROCESSING APPARATUS, PROGRAM THEREOF, AND APPARATUS THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a data processing method capable of reducing a processing load on an authentication request source, when the authentication request source executes processing permitted for the authentication request source after an authentication request destination authenticates the authentication request source. SOLUTION: Degeneration key data difficult to restore a mutual authentication key data are generated by using the mutual authentication key data correlated to processing to be permitted for a user card 73 among processing concerning SAM (secure application module) units 9a, 9b. The degeneration key data and key designating data for designating the mutual authentication key data are written onto the user card 73. COPYRIGHT: (C)2004,JPO