关键词: 无证书, 公钥密码体制, 三方密钥协商, 双线性对

Abstract: Most of the Certificateless tripartite Key Agreement（CL-TKA） protocols use the pairings. After analyzing the existing CL-TKA schemes, a novel CL-TKA protocol is proposed based on the certificateless public key cryptography theory. This protocol solves the key escrow problem of the identity-based public key cryptography（ID-PKC）. The analysis has showed that this protocol provides a high security and efficient.

Key words: certificateless, public key cryptography, tripartite key agreement, bilinear pairings