Abstract: Authenticating a user is very important in un attended environment like wireless sensor network. Wireless sensor networks are used to monitor physical or environmental conditions. Authenticating a user in wireless sensor networks is more difficult than in traditional networks owing to sensor network characteristics such as unreliable communication networks, resource limitation, and unattended operation. As a result, various authentication schemes have been proposed to provide secure and efficient communication. In this proposed paper id based remote user authentication is proposed, where the id is generated by using ABCRNG.

Keywords: Authentication, ABCRNG, Wireless sensor networks, public key cryptography, random number.