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本文对三种国外有代表性的模拟保密机的主要性能作了综合比较。文中对保密体制,话音质量、保密度的评价作了初步分析,其中着重对MA4227保密机的加密方法作了剖析和介绍。
This article made a comprehensive comparison of the main performance of the three representative overseas simulation security machine. The paper makes a preliminary analysis of the evaluation of the security system, the voice quality and the security degree, which focuses on the analysis and introduction of the encryption method of the MA4227 security machine.