Improving an Anonymous and Provably Secure Authentication Protocol for a Mobile User

Table 1

Functionality comparison of the improved protocol with others.

Property	[23]	[24]	[25]	[26]	[27]	[28]	The proposed
Mutual authentication
User anonymity
Impersonation attack
Insider attack
DoS attack
Replay attack
Off-line password guessing attack
Stolen verifier attack
Session key attack
Provable security