Based on the characteristic of the chaotic secure communication system, transmitting the sending signal by the standard digital channel is proposed in this paper.

该文基于混沌保密通信系统特点，提出利用标准数字信道传输发送信号。

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Google Wallet works only with phones with an NFC (near field communication) chip, which allows secure digital transactions over a short distance.

谷歌钱包只能在内嵌了近场通讯(NFC)芯片的手机上使用，这种芯片能在一个较小范围内实现安全的电子支付。

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Computer experiments for secure communication of digital speech are implemented and the results are satisfactory.

通过计算机模拟实验实现数字语音的保密通信，取得了满意的结果。

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