An Efficient and Secure RSA Based Certificateless Signature Scheme for Wireless Sensor Networks

摘要

Certificateless signature cryptography is an efficient approach studied widely because it eliminates the need of certificate authority in public key infrastructure. There are number of security algorithms based on PKC (Public Key Cryptography), ID based certificate less schemes using bilinear maps assumptions. But implementation costs of these schemes are very high. On the other hand RSA is a scheme widely applied in real-life scenarios. So in this paper we proposed a RSA based certificate less signature scheme especially for wireless sensor networks. We have shown that this scheme is secure in random oracles model. A random oracles model is a way to proof the security of cryptographic algorithms which use hash functions and exponential operations in algorithms. Security of this scheme is closely related to discrete logarithm problem. Our scheme provide security against type I attack, type II attack, it also ensures integrity, non-repudiation and authentication.