基于简易混合选择编码的对称密钥自变动加密

摘要

Aiming at the encryption system with lower security requirements, this paper puts forward a symmetrical key automatic changing cryptography scheme based on simple hybrid selection coding, with the combination of unilateral canonical Huffman coding and fixed-length coding. The statistical results of plaintext are used as their own encrypted key and coding basis, which makes the scheme to be easy to implement and calculate and of cost low. It is proved that when the keys are completely unknown, the cracking of the encryption system has great difficulty.%针对安全性要求不太高的加密系统,将单边范式Huffman编码与等长编码相结合,提出一种基于混合选择编码的对称密钥自变动加密方案.通过将明文的统计结果作为自身加密的密钥和编码依据,使方案易于实现,且计算存储成本低.理论分析结果证明,在密钥完全未知的情况下破解该加密体制难度较大.