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本文叙述了密码技术的发展概况,介绍了数字通信系统加密技术的各个方面,包括山农保密通信理论的某些方面、DES系统、一次一密系统,以及公开密钥系统。文中结合遥测数据加密的情况,介绍了保密系统设计的一些重要思想:分组加密和序列加密,“散布”与“混乱”技术,密钥同步方式。还介绍了几种典型的实用保密系统的原理。最后,给出了数字通信保密技术在今后的发展展望。
This paper describes the development of cryptography and introduces all aspects of cryptography in digital communication systems, including some aspects of Shannon’s secret communication theory, DES system, one-time and one-time system, and public key system. In this paper, some important ideas of security system design are introduced based on the situation of telemetry data encryption: packet encryption and sequence encryption, “scatter” and “confusion” technologies and key synchronization methods. Also introduced the principle of several typical practical security system. Finally, the future development of digital communication security technology is given.