JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2015, Vol. 50 ›› Issue (09): 49-54.doi: 10.6040/j.issn.1671-9352.0.2015.070

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Linear properties of the round function of SIMON family of block ciphers

DONG Xiang-zhong, GUAN Jie   

  1. School of Cryptography Engineering, the PLA Information Engineering University, Zhengzhou 450000, Henan, China
  • Received:2015-02-04 Revised:2015-07-22 Online:2015-09-20 Published:2015-09-26

Abstract: SIMON is a family of the lightweight Feistel block ciphers designed by the U.S National Security Agency in 2013. We analyze the linear properties of the F-function F(x) and propose the sufficient conditions for correlation coefficient being 0 and 1/2k respectively when the quadratic terms of the linear approximations are independent. We also give the relationship between the correlation coefficient and the input-output masks when the quadratic terms are not independent.

Key words: correlation coefficient, linear cryptanalysis, SIMON, rotation

CLC Number: 

  • TN918.1
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