Paper 2004/122

A New Two-Party Identity-Based Authenticated Key Agreement

Noel McCullagh and Paulo S. L. M. Barreto


We present a new two-party identity-based key agreement that is more efficient than previously proposed schemes. It is inspired on a new identity-based key pair derivation algorithm first proposed by Sakai and Kasahara. We show how this key agreement can be used in either escrowed or escrowless mode. We also describe conditions under which users of different Key Generation Centres can agree on a shared secret key. We give an overview of existing two-party key agreement protocols, and compare our new scheme with existing ones in terms of computational cost and storage requirements.

Available format(s)
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
identity-based cryptographyauthenticated key agreementTate pairing
Contact author(s)
pbarreto @ larc usp br
2005-02-04: last of 6 revisions
2004-05-26: received
See all versions
Short URL
Creative Commons Attribution


      author = {Noel McCullagh and Paulo S.  L.  M.  Barreto},
      title = {A New Two-Party Identity-Based Authenticated Key Agreement},
      howpublished = {Cryptology ePrint Archive, Paper 2004/122},
      year = {2004},
      note = {\url{}},
      url = {}
Note: In order to protect the privacy of readers, does not use cookies or embedded third party content.