关键词: 无证书, 双线性对, 椭圆曲线, 隐式认证, 密钥协商

Abstract: The computing cost of the bilinear pairing is high, and there is the fault of known session-specific temporary information in two key agreement protocols without bilinear pairing. This paper proposes a certificateless implicit authentication and key agreement protocol without bilinear pairing, and proves its security in the random oracle model. The new protocol is based on the elliptic curve computational Diffie-Hellman assumption, requires only three times scalar multiplication operation of point in elliptic curve. The computing costs of this protocol are lower than those of the other ones that are the same type with the one in this paper. In addition, the new protocol adopts the implicit authentication scheme that achieves the known session-specific temporary information security, which precedes the existing ones.

Key words: certificateless, bilinear pairing, elliptic curve, implicit authentication, key agreement