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Proceedings Paper

Chaotic bit sequences for stream cipher cryptography and their correlation functions
Author(s): Tohru Kohda; Akio Tsuneda
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Paper Abstract

Two types of balanced binary sequence have recently been defined, referred to as a chaotic threshold sequence and a chaotic bit sequence, each of which is obtained from chaotic real- valued orbits generated by nonlinear maps. This paper presents a stream cipher system whose running-key sequences are threshold and bit sequences generated by Chebyshev polynomials. Such a system has the following characteristics: (1) Chebyshev threshold and bit sequences can easily generate unpredictable i.i.d. binary random variables; (2) The correlation properties of ciphertexts are at least as good as those of the standard block ciphers, DES and FEAL. Since portable ANSI C permits us to implement such a cipher system in the floating-point environment, Chebyshev threshold and bit sequences are excellent choices for running-key sequences in stream cipher cryptography.

Paper Details

Date Published: 1 December 1995
PDF: 12 pages
Proc. SPIE 2612, Chaotic Circuits for Communication, (1 December 1995); doi: 10.1117/12.227907
Show Author Affiliations
Tohru Kohda, Kyushu Univ. (Japan)
Akio Tsuneda, Kyushu Univ. (Japan)


Published in SPIE Proceedings Vol. 2612:
Chaotic Circuits for Communication
Jaafar M. H. Elmirghani, Editor(s)

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