These results develop communication theory of secrecy system and help to design and understanding of cryptosystem.
这些结果推广了保密系统的通信理论，对密码体制的设计和理解提供了帮助。
Considering the need of anti-jamming and secrecy in military wireless communication, model of adaptive frequency-hopping (AFH) system is given.
针对军事无线通信抗干扰和保密性需求，给出了自适应跳频通信系统模型。
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