Computer Science – Cryptography and Security
Scientific paper
2011-06-20
Mathematical and Computer Modelling, 54 (11-12), 3143-3152, 2011
Computer Science
Cryptography and Security
Scientific paper
10.1016/j.mcm.2011.08.004
Certificateless public key cryptography simplifies the complex certificate management in the traditional public key cryptography and resolves the key escrow problem in identity-based cryptography. Many certificateless authenticated key agreement protocols using bilinear pairings have been proposed. But the relative computation cost of the pairing is approximately twenty times higher than that of the scalar multiplication over elliptic curve group. Recently, several certificateless authenticated key agreement protocols without pairings were proposed to improve the performance. In this paper, we propose a new certificateless authenticated key agreement protocol without pairing. The user in our just needs to compute five scale multiplication to finish the key agreement. We also show the proposed protocol is secure in the random oracle model.
Chen Yitao
He Debiao
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