关键词: 认证协议, 可否认源认证, 非交互式协议, 可证安全, 基于身份

Abstract: Non-interactive deniable authentication protocol can enable the receiver to identify the source of a received message and prevent a third party from identifying the source of the message, which is very suitable to be used in E-commerce and E-government. Based on computational Diffie-Hellman assumption, using bilinear pairing, a new identity-based deniable authentication protocol was constructed. The security of the scheme was proved under the random oracle model. The analytical results show that the new proposed protocol can resist the forgery attack, spoofing attack, middle attack and replay attack. This protocol is identity-based, which means it needs no certificate and has a simple key management. On the other hand, it is efficient in communications and computation, and its implementation is simple, so that it could be implemented in mobile devices with low power and small processor.

Key words: authentication protocol, deniable authentication, non-interactive protocol, provably secure, identity-based