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A new Hash function based on the generalized Henon map is proposed. We have obtained a binary sequence with excellent pseudo-random characteristics through improving the sequence generated by the generalized Henon map, and use it to construct Hash function. First we divide the message into groups, and then carry out the Xor operation between the ASCII value of each group and the binary sequence, the result can be used as the initial values of the next loop. Repeat the procedure until all the groups have been processed, and the final binary sequence is the Hash value. In the scheme, the initial values of the generalized Henon map are used as the secret key and the messages are mapped to Hash values with a designated length. Simulation results show that the proposed scheme has strong diffusion and confusion capability, good collision resistance, large key space, extreme sensitivity to message and secret key, and it is easy to be realized and extended. 相似文献
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Dynamics of erbium-doped fibre laser with optical delay feedback and chaotic synchronization 总被引:1,自引:0,他引:1 下载免费PDF全文
The dynamical behaviour of the erbium-doped fibre single-ring laser
with an optical delay feedback is discussed. Simulation shows that as
the delay
rate increases, the
lasing light displays period-doubling which leads to chaos and via reverse
period-doubling route returns from chaos to periodic. At a particular delay rate the intermittently chaotic route to chaos is also
observed. The identical synchronization based on
chaos in this ring laser is demonstrated by
numerical simulation. 相似文献
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