Chaotic bit sequences for stream cipher cryptography and their correlation functions

Tohru Kohda; Akio Tsuneda

doi:10.1117/12.227907

1 December 1995 Chaotic bit sequences for stream cipher cryptography and their correlation functions

Tohru Kohda, Akio Tsuneda

Proceedings Volume 2612, Chaotic Circuits for Communication; (1995) https://doi.org/10.1117/12.227907
Event: Photonics East '95, 1995, Philadelphia, PA, United States

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.

Citation Download Citation

Tohru Kohda and Akio Tsuneda "Chaotic bit sequences for stream cipher cryptography and their correlation functions", Proc. SPIE 2612, Chaotic Circuits for Communication, (1 December 1995); https://doi.org/10.1117/12.227907

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