By using SP algorithm and error correction code technology, a combating burst error and large capacity data hiding method for secret transmission was proposed based on images.
采用SP交织算法、纠错编码，给出了一种基于图像的抗突发误码的大容量数据嵌入隐秘传输方法。
With the standard code computing methods being opened, the accounting system and the safety of code technology protection depend on the protection of secret key.
随着标准密码算法细节的公开，密码技术保护的信息系统的安全就取决于密钥的保护。
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.
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。
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