文章把线性复杂度理论检用于密码技术中，设计一种实用的序列随机性检验方法。
Linear complexity theory be applied to cryptographic technology, designing a testing method of a random sequence.
本文沿用传统密码学的基本观念，对集中式计算机系统中的软件程序加密、解密实用技术进行了论述。
Based on the basic principles of traditional secret code theory, this paper analyses and discusses the practical technology keeping and undoing a program secret in the concentrative computer system.
把近似熵用于密码技术中，设计一种实用的随机数检验方法。
Approximate entropy be applied to cryptographic technology, designing a testing method of a random sequence.
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