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Lecture notes in computer science

Security Analysis and Applications of Standard Key Agreement Protocols

Soohyun Oh, Jin Kwak, Seungwoo Lee, Dongho Won

Published Jan 1, 2003• 7 citations
Publisher
DOI
10.1007/3-540-44843-8_21

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The security of a provably secure identity-based authenticated key agreement protocol in the standard model was analyzed,and it was found that the protocol used in escrowless mode has security flaws.When the private key generator(PKG) is controlled or attacked,all of the session keys can be obtained.To resist this attack,the identity-based authenticated key agreement protocol was improved.This new protocol was proven to be secure in the standard model and has the property of not needing session key escrow.
The existing identity-based authenticated key agreement(ID-AKA) protocols in standard model either had known security flaws or could be verified security in weak security models.This paper proposed an extended ID-AKA protocol,which fully considered the security needs for leaking the long-term private keys,the session temporary secrets and the PKG master key.It further defined two types of fresh oracle and a session-state query,based on the ID-BJM security model,in which simulated secure games of key-compromise impersonation and perfect forward secrecy respectively.The new protocol was proven to meet the strong security with the improved ID-BJM model.The comparative analysis shows that the new protocol not only has high security,but lower computational costs.And the extended ID-AKA protocol can be used to build secure point to point communication channel on the application scenarios without key escrow.