该方案保密性强，信道传输量低。
The scheme has high quality of secrecy and low channel transmission amount.
该电路多应用于遥控指令的频谱扩展，结构简单、保密性强。
It is mainly applied to expanding frequency of the telecontrol code. The circuit has more simple configuration and safe secrecies.
该密码锁具有密码预置，保密性强，误码报警，耗电极省等特点。
It has the functions of preestablishing secret code, keeping secret well, error code warning and less power consumption, etc.
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