Date Added: Jan 2012
Password is the most commonly used authentication technique in smart card based authentication protocols. During communication, the static identity based authentication protocols leaks out the user's authentication messages corresponding to static identity to the attacker. Therefore, the attacker can trace and identify the different requests belonging to the same user. On the other hand, the dynamic identity based authentication protocols provide multi-factor authentication based on the identity, password, smart card and hence more suitable to e-commerce applications.