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Information security and cryptography

Identity-Based Key Agreement

Colin Boyd, Anish Mathuria, Douglas Stebila

Published Nov 6, 2019• 2 citations
Publisher
DOI
10.1007/978-3-662-58146-9_7

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Almost all the existing identity-based key agreement (ID-KA) protocols cannot achieve both ephemeral secret reveal resilience and pairing-free. In this paper, a pairing-free ID-KA protocol is proposed, which captures all basic desirable security properties including key generation center forward secrecy, key compromise impersonation resilience and ephemeral secrets reveal resistance. On the other hand, the proposed scheme only needs one round communication between the two parties. Compared with the previous ID-KA protocols, the proposed scheme is more secure and efficient.
Certificateless cryptography aims at combining the advantages of identity based and public key cryptography in order to avoid the key escrow problem inherent in the identity based cryptography and cumbersome certificate management in the traditional public key infrastructure. The provably secure certificateless key agreement protocol is proposed by Lippold et al. in 2009, but their protocol suffers from computation burden. Owing to the above-mentioned situations, a new certificateless two party key agreement protocol (CL-KA) is proposed and the security attributes are analyzed in the extended Canetti-Krawzcyk(eCK) security model. Our protocol only requires each entity to compute two pairings, up to now, it turns out to be the most efficient one of all the previously known security CL-KA schemes.
Certificateless cryptography aims at combining the advantages of identity based and public key cryptography in order to avoid the key escrow problem inherent in the identity based cryptography and cumbersome certificate management in the traditional public key infrastructure. A new two party certificateless key agreement protocol (CL-KA) is proposed and we proved it secure in the random oracle model (ROM). Our protocol only requires each entity to compute one pairing, up to now, it turns out to be the most efficient one of all the previously known CL-KA schemes.