Recently, Lee, Lai and Li proposed a dynamic identity based remote user authentication scheme using smart card to remedy the weaknesses of Lee-Lin-Chang’s scheme. However, we find that Lee-Lai-Li’s scheme is still insecure and vulnerable to offline dictionary attack. Besides, the scheme suffers from low efficiency in wrong password detection process and password change phase. To eliminate these weaknesses, we propose an improved scheme. Through comparative analysis, we illustrate that our proposed scheme is more secure and simultaneously keeps low cost
To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.