通过对语音信号加密的研究，参数自适应滞后同步具有很好的抗参数扰动特性。
The parametric adaptive lag synchronization shows the character against vibration of parameters through the encryption of sound signal.
一旦与另外一部手机取得联系，由双方手机商定通信信号加密密码，再进行实质性通信。
Once a cell phone contacted with another, they will agreed to communications and encrypt the signal with a password from the two sides, and then substantive communication.
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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