A secure user anonymity-preserving biometric-based multi-server authenticated key agreement scheme using smart cards
We analyze recently proposed Chuang and Chens scheme for multi-server environment. We show that their scheme is still vulnerable to different known attacks. We then propose an improved scheme with user anonymity and low computation overhead. Formal and informal security analysis/verification show that our scheme is secure. High security and low overhead make our scheme suitable for practical applications.
security user anonymity multi-server smart card remote user authentication biometrics avispa