通用的DES数据加密算法程序,C编写,加密性能高,目前广泛应用在产品设计上-common DES Data Encryption Algorithm, C, the high-performance encryption, widely used in product design 下载
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基于FPGA加密芯片设计论文（AES和DES算法）-FPGA-based encryption chip design thesis (AES and DES algorithm) 下载
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根据设计要求：1）具有文件加密和解密功能；2）具有加解密速度统计功能；3）采用密文反馈链接和密文挪用短块处理技术。我们可以知道，程序要有加密模块、解密模块、子密钥生成模块，这三个模块构成DES算法。DES算法再构成3DES，这很简单，只要加个密钥便可实现。3DES还必须工作在密文反馈连接模式下和使用密文短块挪用技术。至于速度统计功能就很好实现，用文件长度除以处理时间便是加解密速度。-based on the design requirements : 1) with file encryption and decryption function; 2) the speed with the encryption and decryption functions of statistics; 3) Use of dense text links and feedback secret misappropriation short pieces of text processing technology. We know that procedures have encryption module, decryption modules for key generating modules, which constitute three modules DES algorithm. DES algorithm constitute 3DES, this is very simple, as long as add key can be reached. 3DES must also work in close link text feedback mode and the use of short text block secret misappropriation of technology. As for the speed of statistical functions properly achieved, divided by the length of documents with the processing time is the speed encryption and decryption. 下载
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IDEA是一个分组长度为64位的分组密码算法，密钥长度为128位（抗强力攻击能力比DES强），同一算法既可加密也可解密。 IDEA的“混淆”和“扩散”设计原则来自三种运算，它们易于软、硬件实现（加密速度快）： -IDEA is a packet length of the 64 block cipher algorithms, key length of 128 (anti strong offensive capability than-DES), the same encryption algorithm can be declassified. IDEAs "confusion" and "proliferation" design principles from the three operators, easy software and hardware to achieve (encryption speed) : 下载
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DES( Data Encryption Standard)算法，于1977年得到美国政府的正式许可，是一种用56位密钥来加密64位数据的方法。 IDEA是International Data Encryption Algorithm 的缩写,是1990年由瑞士联邦技术学院来学嘉X.J.Lai 和Massey提出的建议标准算法称作PES( Proposed Encryption Standard) 。Lai 和Massey 在1992 年进行了改进强化了抗差分分析的能力改称为IDEA 它也是对64bit大小的数据块加密的分组加密算法密钥长度为128位它基于“相异代数群上的混合运算”设计思想算法用硬件和软件实现都很容易且比DES在实现上快的多。IDEA自问世以来，已经经历了大量的详细审查，对密码分析具有很强的抵抗能力，在多种商业产品中被使用。-DES (Data Encryption Standard) algorithm. in 1977 the United States governments official permission, is a key 56 to 64 data encryption methods. IDEA is the International Data Encryption Algorith m initials yes in 1990 by the Swiss Federal Institute of Technology Xuejia Lai X. J. Massey, and the recommendations of the standard operator France called the PES (Proposed Encryption Standard). Lai and Massey in 1992 by improving strengthened against differential analysis of the capacity it renamed IDEA is the size of the 64 bit encryption of the data block encryption algorithm key to a length of 128 based on "different algebra Groups of mixed operation "design algorithm with hardware and software and is easy to achieve than in DES soon have more. Since the inception of IDEA has go 下载
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