基于DES对称加密体制的探讨  

Analysis of Encryption System Based on the DES Symmetric

作　　者：刘浪[1] 周新卫[1] 

机构地区：[1]南昌大学共青学院,江西共青城332020

出　　处：《科技广场》2012年第10期10-13,共4页Science Mosaic

摘　　要：DES是一个分组密码算法,它使用56位的密钥,以64位为单位对数据分组进行加密和解密。报文分组后,明文与密文的长度相同,均为64位。DES是一个对称密码体制,加密与解密使用相同的密钥,同时,DES的加密和解密也使用同一算法(在硬件与软件实现时,有利于加密单元的重用)。对称加密体制的DES所有保密性均依赖于密钥,密钥是保证对称加密体制安全性最核心的元素。该算法自问世以来在很长的一段时间内,经受住了无数密码爱好者和科学家的研究与破译,目前在民用领域得到了广泛应用。DES is a block cipher algorithm, which uses a 56 bit key, 64 bits of a data packet encryption and decryption, packet, plaintext and ciphertext of the same length, each 64 bits. DES is a symmetric cryptography, in which encryption and decryption uses the same key. At the same time, DES encryption and decryption also use the same algorithm （ in the realization of hardware and software, in favor of an encryption unit for reusiNG ）. All con- fidentiality of symmetric encryption system DES dependens on the key, which is to ensure the symmetrical encryp- tion system security. Since the invention of the algorithm, numerous password lovers and scientists have studied it. Now it is widely used in civil fields.

关 键 词：DES 分组 对称 加密 安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]