To enhance security in use of an information processing terminal.
A recording medium (30) stores data for authentication (32), volume information (35) and checking data for authentication (33) to be a hash value using the data for authentication (32) and the volume information (35). A data processor (10) has a storage device (20) in which data for checking (22) corresponding to the data for authentication (32), a volume information (35) and checking data for checking (23) to be a hash value using the data for checking (22) and the volume information (25). The data processor (10) has an authentication processing part (10a) performing authentication determination by using the data for authentication (32) in the recording medium (30) and the data for checking (22) in the storage device (20).
COPYRIGHT: (C)2005,JPO&NCIPI
Hiroshi Fujisaki
Minoru Nagasaki
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Michio Nagai
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