J4 ›› 2014, Vol. 41 ›› Issue (2): 15-19+50.doi: 10.3969/j.issn.1001-2400.2014.02.003

• Original Articles • Previous Articles     Next Articles

Attack method against the McEliece cryptosystem based on the correlative quasic-cyclic codes set

LIU Jingmei1;WANG Yanli1;LIANG Bin1;ZHAO Senlin2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. College of Electronic Engineering, Xi'an Univ. of Posts & Telecommunications, Xi'an  710061, China)
  • Received:2012-12-23 Online:2014-04-20 Published:2014-05-30
  • Contact: LIU Jingmei E-mail:jmliu@mail.xidian.edu.cn

Abstract:

Focusing on the security of McEliece public key cryptosystem based on the QC-LDPC code, a new attack algorithm based on the correlative quasi-cyclic(QC) code word is proposed. As the code word in the QC code set is shifted cyclically which is equivalent to information retransmission, the algorithm's effect is better. Performance is analyzed from probability of the correct decipher and computational complexity. Simulation results show that the proposed algorithm possesses a higher probability of the correct decipher (0.999) and a lower work factor (240.7).

Key words: McEliece public key cryptosystem, QC-LDPC code, attack algorithm, work factor

CLC Number: 

  • TN918.1