A New User Authentication Scheme for Hierarchical Wireless Sensor Networks

Abstract

Recently, Das et al. proposed a new password-based user authentication scheme in hierarchical wireless sensor networks and claimed this scheme is security against different kinds of attack. However, in this paper, we analyze their scheme and show that their scheme has some pitfalls and can be more efficient through optimize the authentication process. Then we propose an enhanced scheme to overcome the inherent weakness. The enhanced scheme achieves more secure and efficient in WSNs.