无证书的公钥密码学(CL-PKC ) 避免固有的 escrowof 基于身份的密码学并且不要求证书保证真实性得到 ofpublic 钥匙。基于 CL-PKC,我们在场一把有效的经常回合的组钥匙交换协议,它在计算 Diffie-Hellman 的难驾驭下面是 provably 安全的问题。Ourprotocol 是有完美的前面的秘密的贡献关键交换并且有仅仅二 communicationrounds。它因此比另外的协议更有效。而且,我们的协议提供有效的经常回合的组钥匙交换协议和很秘密的分享计划 couldbe 采用了构造我们的协议的方法 todesign。
Certificateless public key cryptography (CL-PKC) avoids the inherent escrow of identity-based cryptography and does not require certificates to guarantee the authenticity of public keys. Based on CL-PKC, we present an efficient constant-round group key exchange protocol, which is provably secure under the intractability of computation Diffie-Hellman problem. Our protocol is a contributory key exchange with perfect forward secrecy and has only two communication rounds. So it is more efficient than other protocols. Moreover, our protocol provides a method to design efficient constant-round group key exchange protocols and most secret sharing schemes could be adopted to construct our protocol.