Security analysis of a multi-receiver identity-based key encapsulation mechanism

Jong Hwan Park, Dong Hoon Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In INDOCRYPT 2006, Chatterjee and Sarkar suggested a multi-receiver identity-based key encapsulation mechanism that is secure in the full model without random oracles. Until now, it has been believed that their scheme is the only one to provide such a security feature, while achieving sub-linear size ciphertext. In this letter, we show that their scheme is insecure in the sense that any revoked user can retrieve a message encryption key, even without colluding with other revoked users. Our attack comes from an analysis of a publicly computable surjective function used in the scheme.

Original languageEnglish
Pages (from-to)329-331
Number of pages3
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE92-A
Issue number1
DOIs
Publication statusPublished - 2009 Jan 1

Keywords

  • Identity-based key encapsulation
  • Key distribution
  • Multireceiver setting

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Signal Processing

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