Earticle

초록

영어

Certificateless public key cryptography (CL-PKC) is an appealing paradigm with the advantages of both conventional public key cryptosystem and ID-based cryptosystem because it avoids using certificates and eliminates the key escrow problem. Ring signcryption is an attractive primitive which allows one user to send a message anonymously, confidentially and authentically. Recently, Qi et al. proposed a novel certificateless ring signcryption scheme with bilinear pairings, and claimed the scheme is provably-secure in the random oracle model. In this paper, we reveal that Qi et al.’s scheme is not secure against both a Type I adversary and a Type II adversary. By giving specific attacks, we found it is unable to meet the fundamental requirements of confidentiality and unforgeability.

목차

Abstract
 1. Introduction
 2. Preliminaries
  2.1. Bilinear Pairings
  2.2. Formal Definition of Certificateless Ring Signcryption
  2.3. Security Requirements of Certificateless Ring Signcryption
 3. Review of Qi et al.’s Certificateless Ring Signcryption Scheme
 4. Cryptanalysis of Qi et al.’s CLRSC Scheme
  4.1. Message Confidentiality Attack
  4.2. Unforgeability Attack
 5. Conclusions
 Acknowledgements
 References

키워드

저자

• Hongzhen Du [ School of Mathematics and Information Science, Baoji University of Arts and Sciences, Baoji 721007, China ]
• Qiaoyan Wen [ School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Security and Its Applications

• 간기

  격월간

• pISSN

  1738-9976

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605