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| Improved One-Round Key Exchange Protocol in the Standard Model |
| Hu Xue-xian①; Liu Wen-fen①; Lan Ju-long② |
①Department of Information Research, Information Engineering University, Zhengzhou 450002, China;
②National Digital Switching System Engineering & Technological Research Center, Zhengzhou 450002, China |
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Abstract In this paper, a new authenticated key exchange protocol is proposed and its security is proved in the stronger version of the well-known CK model revised by Krawczyk. The analysis of the protocol is under standard model instead of Random Oracle Model (ROM). The proposal is based on the two basic computational complexity assumptions of DDH assumption and the existence of Pseudo Random Function (PRF) family. Compared with Boyd et al.’s protocol, the protocol possesses simpler communication and computation complexity.
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Received: 24 November 2008
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2009, Vol. 31 
