A variant of Park-Lee identity-based encryption system

Jong Hwan Park, Dong Hoon Lee

Research output: Contribution to journalArticlepeer-review


Recently, Park and Lee suggested a new framework for realizing Identity-Based Encryption (IBE) trapdoor called 'two-equationrevocation', and proposed a new IBE system that makes use of a Map-To-Point hash function. In this paper, we present a variant of the PL system by giving a simple way to remove the Map-To-Point hash function from the PL system. Our variant is proven to be secure under non-standard security assumptions, which results in the degradation of security. Instead, our variant can have several efficiency advantages over the PL system: (1) it provides receiver's anonymity, (2) it has no correctness error, (3) it has shorter ciphertext, and (4) it has faster encryption. As a result, (when not considering security assumptions and security losses) our variant is as efficient as the Boneh-Boyen and Sakai-Kasahara IBE systems that are considered as being the most practical ones.

Original languageEnglish
Pages (from-to)720-732
Number of pages13
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number3
Publication statusPublished - 2016 Mar 1


  • Bilinear maps
  • Identity-based encryption

ASJC Scopus subject areas

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

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