A Fast Non-Linear Digital Chaotic Generator in Secure Communication
نویسندگان
چکیده
In this paper, we propose a new chaotic map, Variational Logistic Map (VLM), modified from logistic map to be used in secure communication. Compared with classical logistic map, VLM has large parameter space without windows and can be implemented at low hardware cost. Referring to theBigCrush test suite in TestU01, VLM with disturbing method can significantly improve the output complexity as compared with other logistic-map based generators and piecewise linear chaotic map. Experiments show that the throughput of a 32-bit VLM is up to 3200 Mbps in 0.18μm process. Furthermore, a chaotic crypto scheme, Multi-VLM(MVLM), constructed by 4 VLMs can generate an output sequence with a minimal length equal to 2128 by a 128-bit external key.
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