J4 ›› 2013, Vol. 40 ›› Issue (3): 172-179+200.doi: 10.3969/j.issn.1001-2400.2013.03.026

• Original Articles • Previous Articles     Next Articles

New design of LFSR based stream ciphers to resist power attack

ZHAO Yongbin1,2;HU Yupu1;JIA Yanyan3   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. School of Information Science and Technology, Shijiazhuang Tiedao Univ., Shijiazhuang  050043, China;
    3. College of Computer Science and Technology, Xi'an Univ. of Science and Technology, Xi'an  710054, China)
  • Received:2012-02-24 Online:2013-06-20 Published:2013-07-29
  • Contact: ZHAO Yongbin E-mail:zhaoyb@stdu.edu.cn

Abstract:

An additional large number of flip-flops are required for available linear feedback shift register (LFSR) design which can completely resist power attack on the stream cipher based on LFSR. By analyzing the relations between the delayed sequence and the initial states, the lower bound on the number of flip-flops in the design of LFSR based stream ciphers to resist the power attack is given and a novel lightweight design to resist power attack is proposed. With this method, the number of flip-flops required is decreased to five and the power consumption is significantly reduced.

Key words: cryptography, stream ciphers, power analysis attack, linear feedback shift registers, flip-flop, Boolean functions

CLC Number: 

  • TN918.1