基于无证书的P2PSIP可认证密钥协商方案

Certificate-Free P2PSIP Authenticated Key Agreement Scheme

针对P2PSIP协议的分布式特点、低呼叫时延要求和面临的安全威胁,基于无证书公钥密码体制下的可认证密钥协商和签名,提出了一种高效的P2PSIP可认证密钥协商方案,并分析了该方案的正确性、安全性和运算效率。该方案实现了P2PSIP呼叫的可认证密钥协商,克服了使用公钥基础设施带来的缺点,方案具有较低的通信开销且无对运算,因此对比其它方案具备较高的运算效率,降低了呼叫时延并提升了用户体验效果。

In view of the distributed characteristics,low call delay requirements and security threats of P2PSIP protocol,based on authenticated key agreement and signature in certificate-free public key cryptosystem,an efficient P2PSIP certifiable key agreement scheme is proposed.The correctness,security and computational efficiency of the scheme are analyzed.The scheme achieves authenticated key agreement for P2PSIP call,overcomes the disadvantage of using public key infrastructure,and has lower communication overhead and no pairing operation.Therefore,compared with other schemes,this scheme has higher operational efficiency;reduces call delay and improves user experience effect.