Sequential biometric cryptographic system and sequential biometric cryptographic processing method

摘要

[Problem] To implement sequential multimodal determination having a high accuracy improvement effect in biometric cryptography and obtain good security, accuracy, and convenience regarding cryptographic processing. [Solution] A sequential biometric cryptosystem 10 includes: a registration terminal 100 that extracts a set of feature data from each of multiple pieces of biological information acquired from each user, sequentially selects, out of these, a group of multiple sets of feature data, incrementing the number of combined sets, creates a protection template for each selected group of feature data, and stores the protection template into a storage apparatus101; and an authentication terminal 150 that extracts feature data from a combination including one or more pieces of biological information of a specified user, acquired through a sensor on the user, verifies a combination of the extracted feature data against the protection template derived from the biological information having the same specified attribute, and performs, if the verification is successful, specified processing on the user.