摘要： 原有对称加密算法采用置换与替换技术。该文提出一种基于圆性质的对称密钥加密算法，采用随机数技术与密码学杂凑函数，使加密后的密文随机分布于n维几何空间，实现了抗密码分析攻击，而穷举攻击在计算上是不可行的。该算法适用于带时间戳加密、短明文加密等应用环境，实验结果验证了其可行性。

关键词: 对称密码, 加/解密算法, 圆性质

Abstract: The former symmetric encryption algorithms use substitution and transposition techniques. This paper presents a symmetric encryption algorithm based on circle property. The techniques of random number and cryptographic hash function are used in this algorithm. So the cipher text randomly distributes in the n-dimensional space and led to cryptanalysis being difficult. From the security analysis the brute-force attacks are infeasible. It is applicable for encryptions with timestamp and short plain text encryptions. Experimental results verify that this algorithm is feasible.

Key words: symmetric cryptogram, encryption and decryption algorithm, circle property

中图分类号: 

• TP309