Paper 2005/300

Towards Security Two-part Authenticated Key Agreement Protocols

Songping Li, Quan Yuan, and Jin Li


We first present a new security 2-AK protocol, which is more secure and more efficient than previously proposed ones. Meanwhile, we point that Xie's ID-2-AK protocol modified from McCullagh-Barreto in CT-RSA 2005 doesn't provide protection against KCI attack likewise, and finally utilize the modular arithmetic, first proposed in MQV and also used in Kim, to get a modified new ID-2-AK protocol. On second thoughts, we give another ID-2-AK protocol utilizing the operation of addition in finite field like our forenamed 2-AK protocol. The two ID-2-AK protocols are in possession of all the desired security attributes. We also compare our new protocols with others in terms of computational cost and security properties.

Note: Minor revision

Available format(s)
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
key managementauthenticated protocolID-basedKey Compromise Impersonation
Contact author(s)
lsp @ pku edu cn
2005-09-07: last of 15 revisions
2005-09-02: received
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      author = {Songping Li and Quan Yuan and Jin Li},
      title = {Towards Security Two-part Authenticated Key Agreement Protocols},
      howpublished = {Cryptology ePrint Archive, Paper 2005/300},
      year = {2005},
      note = {\url{}},
      url = {}
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