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密码学算法密码学包括密码分析(cryptanalysis)和密码技术(cryptography)两大领域,前者的目的是为了破密,后者则是为了发展密码技术来提高加密的安全性,两者既是一对矛盾又相辅相成共同发展。密码学研究的内容也有两大主题,即保护信息传递的机密性和对信息发送者身份以及信息完整性的验证鉴定,在电视加解扰技术中主要是对第一个主题进行研究,随着交互电视和金融电子化兴起以及国际网络的互联互通,对解决第二主题的需求也更趋迫切,人们更重视对各种密钥密码系统的研究和应用,
Cryptography Algorithm Cryptography consists of two major areas: cryptanalysis and cryptography. The purpose of the cryptanalysis is to break the cryptography. The latter is to develop cryptographic techniques to improve the security of cryptography. And complement each other for common development. There are two main topics in the study of cryptography, that is, to protect the confidentiality of information transmission and to verify the identity of information senders and information integrity. In the television descrambling technique, the first topic is mainly studied. With the The rise of interactive television and electronic finance and the interconnection of international networks have also become more and more urgent for solving the second theme. People pay more attention to the research and application of various key and cryptographic systems,