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6.1密码和密码分析密码术是在敌人有截获消息并正确地翻译消息的技能时用来确保消息的安全的一种技术。尽管现代的密码技术能够免除窃听的可能,然而保密通信比普通通信对干扰更为敏感。迪菲和赫尔曼[1]全面考察了一般环境下的密码术。这里我们致力于研究保密数字通信这个最重要的方面。实际的密码系统必须产生不仅能够抵抗密码分析而且特许人员也能有效地进行脱密的密文。用数字方法比用模拟方法更能令人满意地满足这些要求。因此,如果
6.1 Password and Password Analysis Cryptography is a technique used to ensure the security of messages when an enemy has the ability to intercept messages and correctly translate messages. Although modern cryptographic techniques eliminate the possibility of eavesdropping, confidential communications are more susceptible to interference than normal communications. Diffie and Herman [1] examine the general environment of cryptography. Here we are devoted to the most important aspect of confidential digital communications. The actual cryptosystem must produce ciphertext that not only counteracts the cryptanalysis but also allows franchisees to effectively decrypt it. These requirements are more satisfactorily satisfied numerically than by simulation. So if