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Secure Certificateless Two-Party Key Agreement with Short Message

Han-Yu Lin

Open publisher page 6 citations

Abstract

Two-party key agreement protocol allows two communication parties to share a common key for secure communication. Constructed from the certificateless public key cryptography (CL-PKC), a certificateless key agreement (CL-KA) protocol can not only solve the key escrow problem inherited from identity-based systems, but also avoid the troublesome issue of certificate management. Although the topic of two-party CL-KA has been extensively studied during past few years, it is unknown whether such a protocol can be achieved with only one exchanged message. In this paper, we put this idea into practice and propose a new one-round CL-KA for two-party. Specifically, each party of the proposed protocol only has to transmit one group element for sharing a session key and still maintains low computational costs. Moreover, we analyze the security of our scheme in the extended Canetti-Krawzcyk (eCK) security model.DOI: http://dx.doi.org/10.5755/j01.itc.45.1.12595

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What this paper is about

Two-party key agreement protocol allows two communication parties to share a common key for secure communication. Constructed from the certificateless public key cryptography (CL-PKC), a certificateless key agreement (CL-KA) protocol can not only solve the key escrow problem inherited from identity-based systems, but also avoid the troublesome issue of certificate management. Although the topic of two-party CL-KA has been extensively studied during past few years, it is unknown whether such a protocol can be achieved with only one exchanged message. In this paper, we put this idea into practice and propose a new one-round CL-KA for two-party. Specifically, each party of the proposed protocol only has to transmit one group element for sharing a session key and still maintains low computational costs. Moreover, we analyze the security of our scheme in the extended Canetti-Krawzcyk (eCK) security model.DOI: http://dx.doi.org/10.5755/j01.itc.45.1.12595

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Available abstract

Two-party key agreement protocol allows two communication parties to share a common key for secure communication. Constructed from the certificateless public key cryptography (CL-PKC), a certificateless key agreement (CL-KA) protocol can not only solve the key escrow problem inherited from identity-based systems, but also avoid the troublesome issue of certificate management. Although the topic of two-party CL-KA has been extensively studied during past few years, it is unknown whether such a protocol can be achieved with only one exchanged message. In this paper, we put this idea into practice and propose a new one-round CL-KA for two-party. Specifically, each party of the proposed protocol only has to transmit one group element for sharing a session key and still maintains low computational costs. Moreover, we analyze the security of our scheme in the extended Canetti-Krawzcyk (eCK) security model.DOI: http://dx.doi.org/10.5755/j01.itc.45.1.12595

Key concepts: Key escrow, Key-agreement protocol, Computer science, Computer security, Public-key cryptography, Key (lock), Session key, Protocol (science)

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