An efficient lightweight cryptographic scheme of signcryption based on hyperelliptic curve

The emerging trend now in network security is lightweight cryptography which is the need of the hour due to the growth of wireless technology. As the internet technology grows day by day identity authentication in wireless network is more important. Generally, these wireless systems are in demand of security and resource (power). In order to meet these constraints an important lightweight scheme called Remote user authentication with signcryption is proposed with security features such as confidentiality, integrity (originality of sender and receiver), message and user authentication, non-repudiation, forward secrecy and public verifiability. Signcryption is a new paradigm that fulfils the functions of signature and encryption in one logical step and therefore the cost in terms of computation is reduced compared to the scheme signature-then-encryption. Till today many Remote user authentication schemes based on Elliptic curve, El-Gamal and RSA have been proposed. This paper points out the limitations of existing scheme such as lack in security aspects for example, password guessing attack, impersonation attack, forward secrecy, computation overhead, larger memory requirements. The proposed scheme based on signcryption using hyper elliptic curve that fulfils all the gaps of existing system.