Chapter

Cryptography and Coding

Volume 3796 of the series Lecture Notes in Computer Science pp 428-441

Efficient Identity-Based Key Encapsulation to Multiple Parties

  • M. BarbosaAffiliated withLancaster UniversityDepartamento de Informática, Universidade do Minho
  • , P. FarshimAffiliated withLancaster UniversityDepartment of Computer Science, University of Bristol

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Abstract

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.

Keywords

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