To protect biological data within a management range on a user's hand with high safety and to reduce user's resistance and risk of leakage of the biological data.
This user confirmation system is provided with a module 1f and a computer 2f. The module 1f is provided with a sensor 11 for performing biological measurement. The computer 2f is provided with a biological data holding part 32a for holding the biological data encrypted by a log on password of the user himself as information indicating that the user has authority corresponding to a user request and a collation calculation part 31a for decoding the biological data of the biological data holding part 32a by the log on password when the user request and the logon password are inputted, for collating the decoded biological data with measurement information measured by the sensor and for outputting notification that the user request should be implemented when a principal and the authority are confirmed by its collation result.
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Sadao Muramatsu
Ryo Hashimoto