Signcryption Approaches for Network Security

Signcryption is a new public key cryptography approach to combine digital signature and encryption functionalities as a consequence of the growing consumer demand for information security. The necessity to achieve confidentiality, integrity, authenticity and non-repudiation properties in data communication that motivates new demands for signcryption schemes. The framework of signcryption involves key generation, signcryption and unsigncryption. Current signcryption schemes development is still limited by the certain constraints given by real-time applications. For example, broadcasting signcrypted message increases bandwidth consumption and computational resource usage remains largely an unsolved problem. In order to address these problems, ElGamal’s signature scheme, Schnorr’s signature scheme or Digital signature schemes , Diffie Hellman method, Elliptic Curve method and RSA algorithm are widely used for signcryption. This paper provides a tutorial and overview of strategies in implementing these algorithms and provides a focus on asymmetric techniques in research.