Abstract:

This paper mainly discusses the dynamic security of group communication. The secrecy and authentication of group communication is realized with sign-cryption technology. The paper constructs an ID-based dynamic group communication sign-cryption scheme, using hyperelliptic curve cryptosystem and ID-based sign-cryption model. The security of the scheme is illustrated. The scheme has high security, low communication cost and simple key management.

Key words: dynamic group, sign-cryption system, hyperelliptic curve