摘要
由于数据库系统仅支持ASCII字符集中的可打印字符,将加密后的记录编码成可打印字符是保证数据库系统正常运行的关键,文中将这一过程称作密文编码。许多现有算法不能将对记录的加密和编码过程结合起来,在时间效率或安全性上存在不足。本文提出一种基于Hill密码思想的数据库密文编码算法,该算法将对记录的加密和加密后的编码合为一个过程,可以很好地解决数据库记录加密和编码问题。它实际上是一种对数据库记录的双重保护机制,具有比同类算法更高的安全性和时间效率。文中还分析了该算法的时间复杂性和安全性,最后提出了下一步的研究方向和目标。
Since only printable characters in ASCⅡ character set can be identified by database systems, to convert encrypted records into strings consisting of printable characters is the crucial measure for database systems to run normally, and this process is called as ciphercoding and is realized through encoding records. Many algorithms mentioned in references can＇t combine encryption operation with encoding operations, and exist defects on time efficiency or security. In order to solve this crucial problem, one cipber-ceding algorithm based on Hill cipher is proposed. In this algorithm, encryption and encoding operations are integrated into one process, and two problems of database, encryption and cipher-coding, are well solved together. Compared with congeneric algorithms, this algorithm has more time efficiency and security. Actually it provides double protection to database records. Time complexity and security property of this algorithm are analyzed, and the next research object is mentioned in the end of this paper.
出处
《计算机与现代化》
2005年第8期81-83,86,共4页
Computer and Modernization
关键词
数据库加密
解密
希尔密码
安全性
破译
database encryption
decryption
Hill cipher
security
decipher
