Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (4): 123-128.doi: 10.1016/S1005-8885(10)60094-5

• Wireless • Previous Articles    

Linear complexity of sequences produced by single cycle T-function

Yan Wang   

  • Received:2010-11-15 Revised:2011-06-02 Online:2011-08-31 Published:2011-08-24
  • Contact: Yan Wang E-mail:lanse-wy@163.com
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (60833008, 60803149), the Scienti?c Research Foundation of Education Department of Shaanxi Provincial Government of China (11JK0503), and the Youth Science and Technology Foundation of Xi’an University of Architecture and Technology (QN0831, QN1024).

Abstract:

Four kinds of sequences generated by single cycle triangular function (T-function) are investigated to check the possibility for a single cycle T-function to be a cryptographic component in stream ciphers. Based on the special properties of single cycle T-function and an algorithm due to Wei, linear complexities of these four kinds of sequence are all acquired. The results show that single cycle T-function sequences have high linear complexity. Therefore, T-function satisfies the essential requirements being a basic component of stream cipher.

Key words:

stream cipher, single cycle T-function, linear complexity

CLC Number: