A Proposal of Key Management Scheme and Its Operation Using Anonymous Biometrics on ID-based Infrastructure

In the information exchange through network, the security risks always exist, that is eavesdropping, defacing, and spoofing by the attacker. PKI (Public Key Infrastructure) will prevent such attacks. But key management is very serious problem in PKI. The public key certificate is issued and distributed by certificate authority, but the authors think that the updating of expired certificate etc. are very costly for users. And secret key management is more serious problem. In order to solve above problems, they propose the scheme that stores protected secret key which is made by combination of biometrics and secret key in the smartcard in ID based cryptography system.