实验表明混沌密码序列对随机性的测试的好坏存在不确定性，因此混沌序列应用到序列密码之前必须对序列进行随机性检测。
The experimentation shows indeterminacy of chaos's time sequence in experiments of randomicity check. So the randomicity of chaos's time sequence must be checked before it become keying sequence.
混沌信号具有天然的随机性，可以作为序列密码应用于信息加密。
The chaotic signal, which possesses natural randomness, can be used for information encryption as sequence cipher.
这部分中，本文提出了基于密码学算法的图象置乱方法和基于混沌序列的图象置乱方法，并把电视信号加密方法应用到数字图象置乱中去。
In this part, the scrambling methods based on cryptography and chaos sequences are presented, and the encryption methods used in the TV are applied to the digital image scrambling.
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