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des算法
- 当今社会是信息化的社会。为了适应社会对计算机数据安全保密越来越高的要求,美国国家标准局(NBS)于1997年公布了一个由IBM公司研制的一种加密算法,并且确定为非机要部门使用的数据加密标准,简称DES(Data Encrypton Standard)。自公布之日起,DES算法作为国际上商用保密通信和计算机通信的最常用算法,一直活跃在国际保密通信的舞台上,扮演了十分突出的角色。现将DES算法简单介绍一下,并给出实现DES算法的VC源代码。 DES算法由加密、解密和子密钥的生成三部分组成。-s
LDPC-2006-02-08.tar.gz
- Software for Low Density Parity Check Codes Radford M. Neal Version of 2006-02-08. This collection of programs and modules, written in C, is intended to support research and education concerning Low Density Parity Check (LDPC) codes. (Note, however,
huffman统计文件中各字符频率
- 建立一个文本文件,统计该文件中各字符频率,对各字符进行Huffman编码,将该文件翻译成Huffman编码文件,再将Huffman编码文件翻译成原文件。 “压缩文件”即:读文件、统计文件中的字符个数、对文件进行哈夫曼编码和译码、并将编码译码后的字符存储在文件中。 根据以上任务说明,设计数据结构,并设计程序完成功能。 -Create a text file, statistical frequency of the characters in the file, the char
rsa
- RSA算法,实现完整。将两个大素数相乘十分容易,但那时想要对其乘积进行因式分解却极其困难,因此可以将乘积公开作为加密密钥。-RSA algorithm based on a very simple fact: the number multiplies two large prime number is very easy, but then to factorization of its product is extremely difficult, so it can be disclose
vernam cifer
- vernam cifer code on PHP.
grain_p3_80
- A new stream cipher, Grain-128, is proposed. The design is very small in hardware and it targets environments with very limited resources in gate count, power consumption, and chip area. Grain-128 supports key size of 128 bits and IV size of 96 bits.