摘要:根据密钥类型不同将现代密码技术分为2类:—类是对称加密(秘密钥匙加密)系统 ;另一类是公开密钥加密(非对称加密)系统。着重讨论DES的加密算法,详细论述了D ES的算法流程,并探讨了DES算法的缺陷和漏洞。 关键词:网络信息安全;DES;对称加密算法;公开密钥加密算法 The DES Encryption Algorithm in Information Secu...
DES加密算法的原理 DES算法把64位的明文输入块变为64位的密文输出块,它所使用的密钥也是64位,首先,DES把输入的64位数据块按位重新组合,并把输出分为L0、R0两部分,每部分各长32位,并进行前后置换(输入的第58位换到第一位,第50位换到第2位,依此类推,最后一位是原来的第7位),最终由L0输出左32位,R0输出...
着重讨论DES的加密算法,详细论述了D ES的算法流程,并探讨了DES算法的缺陷和漏洞。 关键词:网络信息安全;DES;对称加密算法;公开密钥加密算法 The DES Encryption Algorithm in Information Security LI Lian (Software College, Northwestern Polytechnical University, Xi ′an, 710072, China) Abstract:Moderm encryption ...
TheDESEncryption Algorithm in Information Security LI Lian (Software College, Northwestern Polytechnical University, Xi′an, 710072, China) Abstract:Moderm encryption algorithm has two types as the different of key:one is the sy mmetrical encryption system;the other is the public key encryption system...
(one username and one password), But generally 1-factor authentication does not serve the purpose of full security for sensitive data transmission .To send the data (generally more sensitive) we have to wrap the data us...
19、gs to a block cipher in the specific application, still unable to break the encryption algorithm, so completely off by the United States government as a technology export restrictions, it is still widely used, has higher security.1 DES algorithm overviewDES is a symmetric algorithm: encryptio...
Finally, it gives a brief description of security risks that existed in DES encryption algorithm and proposed the application errors of DES encryption algorithm. Key words: Data security and computer security; DES encryption algorithm; File transfer 0 引言 在 信息化的时代 里,数据是承 载信息的基...
23. DES_quad_cksum:is a Kerberos v4 function. It returns a4 byte checksum from the input bytes. The algorithm can be iterated over the input, depending onI<out_count>, 1, 2, 3 or 4 times. If I is non-NULL, the 8 bytes generated by each pass arewritten into I. 24. DES_fcrypt...
measures. Finally, discusses in depth how to improve the security of DES algorithm, DES algorithm to enhance security introduced several improvements, this root According to several methods for improving the current restrictions proposed a bold new program, to make improvements on the DES algorithm. ...
Keywords:network information security;DES; the symmetrical encryption algorithm ;the public key encryption algorithm 古往今来,通信中的安全保密问题一直受到广泛关注。历史上,交战双方在通信安全、保密和密码破译方面的优势均被认为是取得战争胜利的关键因素之一。今天,人类已进入信息化时代,现代通信涉及各个行业,信息...