Abstract:

We design a new way of coupling, namely, an independent variable exclusive coupling, which is applied to skew tent mapping to obtain a new chaotic system. Experiments demonstrate that the system possesses excellent chaotic properties. A pseudorandom bit generator is then constructed based on it, and we employ five statistic tests to evaluate the pseudorandomness of the bit streams generated by the proposed generator. We finally compute the linear complexity of the generated bit streams and the cipher space of the generator. All the experiments illustrate that the generator holds satisfactory properties and is suitable for applications in information security.

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