A New Two-Party Identity-Based Authenticated Key Agreement

  • Noel McCullagh
  • Paulo S. L. M. Barreto
Conference paper

DOI: 10.1007/978-3-540-30574-3_18

Part of the Lecture Notes in Computer Science book series (LNCS, volume 3376)
Cite this paper as:
McCullagh N., Barreto P.S.L.M. (2005) A New Two-Party Identity-Based Authenticated Key Agreement. In: Menezes A. (eds) Topics in Cryptology – CT-RSA 2005. CT-RSA 2005. Lecture Notes in Computer Science, vol 3376. Springer, Berlin, Heidelberg


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.


authenticated key agreement identity-based cryptography bilinear maps Tate pairing 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Noel McCullagh
    • 1
  • Paulo S. L. M. Barreto
    • 2
  1. 1.School of ComputingDublin City UniversityGlasnevin, Dublin 9Ireland
  2. 2.Escola PolitécnicaUniversidade de São PauloSão Paulo(SP)Brazil

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