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We propose a time constraint three-party encrypted key exchange protocol in which both two parties/clients only act as the roles within the relationship of exchanging secure messages constrained by the intersection time periods. The technique of time constraint, in this paper, is that a trusted server generates a serial of secure exchanging messages, which are used to generate multiple session keys...
We propose an enhanced 3PEKE (Three-party Encrypted Key Exchange) scheme, in which both two parties/clients act as the roles upon the relationship of exchange-messages, who are employed in the traditional 3PEKE (Three-party Encrypted Key Exchange) schemes [2-5, 9, 12-17, 19, 23, 26, 27]. Our approach can improve the security of traditional 3PEKE scheme by adding digital time-stamp. By this way, we...
In 2008, Yoon and Yoo [19] proposed a password-based 3PEKE scheme, which can improve some secure weaknesses of the password-based 3PEKE scheme [2]. However, in 2009, Lo and Yeh [14] shown that the 3PEKE scheme [19] cannot resist undetectable on-line password guessing attacks and proposed a new approach to solve this problem. Although they actually propose an improved approach, the exchange-message...
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