Efficient Identity-Based Key Encapsulation to Multiple Parties

  • M. Barbosa
  • P. Farshim
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3796)


We introduce the concept of identity based key encapsulation to multiple parties (mID-KEM), and define a security model for it. This concept is the identity based analogue of public key KEM to multiple parties. We also analyse possible mID-KEM constructions, and propose an efficient scheme based on bilinear pairings. We prove our scheme secure in the random oracle model under the Gap Bilinear Diffie-Hellman assumption.


Key Encapsulation Mechanism (KEM) Hybrid Encryption Identity Based Cryptography Provable Security 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • M. Barbosa
    • 1
  • P. Farshim
    • 2
  1. 1.Departamento de InformáticaUniversidade do MinhoBragaPortugal
  2. 2.Department of Computer ScienceUniversity of BristolBristolUnited Kingdom

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