Fully secure ciphertext-policy attribute based encryption with security mediator

Yuechen Chen, Zoe L. Jiang, S. M. Yiu, Joseph K. Liu, Man Ho Allen Au, Xuan Wang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

11 Citations (Scopus)


Attribute-Based Encryption (ABE) offers fine-grained decryption policy such that users can do decryption if their attributes satisfy the policy. Such flexibility enables it applicable in various applications in government and business. However, there are two issues that should be solved first before it is deployed in practice, namely user revocation and decryption outsourcing. In this paper, we adopt the slightly modified Lewko et al.’s fully-CCA-secure Ciphertext-Policy-ABE (CPABE) combining with Boneh et al.’s idea of mediated cryptography to propose a CP-ABE with SEcurity Mediator (SEM) supporting immediate user revocation. At the same time, by the introduce of SEM, we intendedly outsource most of the computation workload in decryption to SEM side and leave only one exponentiation and one division at user side for decryption. It is proved fully-RCCA-CCA-secure in random oracle model.
Original languageEnglish
Title of host publicationInformation and Communications Security - 16th International Conference, ICICS 2014, Revised Selected Papers
PublisherSpringer Verlag
Number of pages16
ISBN (Print)9783319219653
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event16th International Conference on Information and Communications Security, ICICS 2014 - Hong Kong, Hong Kong
Duration: 16 Dec 201417 Dec 2014

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference16th International Conference on Information and Communications Security, ICICS 2014
Country/TerritoryHong Kong
CityHong Kong


  • CP-ABE
  • Decryption outsourcing
  • Dual encryption system
  • Security mediator
  • User revocation

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


Dive into the research topics of 'Fully secure ciphertext-policy attribute based encryption with security mediator'. Together they form a unique fingerprint.

Cite this