• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.12C
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• pp.977-983
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• 2010

The output values of chaotic functions look highly unpredictable and random-like. These features are in accord with the requirements for secure cryptosystems. For this reason, many kinds of cryptosystems using chaotic functions have been proposed so far. However, most of those algorithms are not applicable for light cryptosystems because they need a high level of computing ability. In this paper, we propose a new light chaotic cryptosystems which are suitable for the systems with a low level of computing ability. From the simulations, we show the performance of proposed cryptosystems on computational complexity and security level.

• Journal of Advanced Navigation Technology
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• v.17 no.3
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• pp.292-297
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• 2013

In this paper, The design of digital circuits for chaotic composition function which is used for the key-stream generator is studied in this work. The overall design concept and procedure due to the mathematical model of chaotic key-stream generator is to be the explained in detail, and also the discretized truth table of chaotic composition function is presented in this paper. consequently, a composition state machine based on the compositive map with connecting two types of one dimensional and two dimensional chaotic maps together is designed and presented.