关键词: ad hoc网络, 基于身份, 密钥泄漏, 密钥撤销

Abstract: This paper analyzes the identity-based key management schemes for ad hoc networks. A key management scheme with key revocation is proposed for key-exposure, abnormality etc., and a signature scheme is constructed based on this key management scheme. The scheme can prevent message from being forged using the stolen key through revoking the leaked key. Even if the attacker forges the user signature successfully, the user can prove it is invalid by system signature of the revocation message. The system private key is constructed with the distributed generation based on the threshold cryptography in the scheme. It has fault tolerance and can resist the active and passive attacks. Compared with the previous scheme it is more secure.

Key words: ad hoc networks, identity-based, key-exposure, key revocation