An Enhanced Smart Card and Biometrics-Based Authentication Scheme in Multi-server Environment

In a multi-server environment, authentication scheme must achieve a high level of security. Recently, many researchers combine user's biometrics password with smart card to ensure high security of authentication mechanism. Chuang and Chen proposed a classic authentication scheme using smart card together with password and biometrics, and it supports some security properties. However, we analyze this classic scheme and demonstrate this scheme cannot resist some security attacks. Then we propose an enhanced scheme using smart card and biometrics. Finally, we give security proofs of our scheme.