基于分段线性混沌映射的算术编码与加密

Arithmetic coding and encrytion based on piecewise linear chaotic maps

为了提高数据的编解码速率和传输安全,根据迭代斜帐篷映射的反函数可以作为算术编码,提出了基于分段线性混沌映射的算术编码与加密方案。方案将加密嵌入编码过程中,解决了现存方案中编码与加密独立分离的问题,实现了同步编码与加密。结果表明,算法提高了编码效率和密文的不可预测性,并且可以有效抵御选择性明文攻击、短明文攻击和蛮力搜索攻击。

In order to improve the data coding rate and transmission security, according to the inverse function of iteration skew tent map,which could be used as arithmetic coding, this paper propsed a compression and encryption scheme based on the piecewise linear chaotic map. It solved the separate problems of encoding and encryption in the existing program. The simula- tion results indicate that the algorithm improves the coding efficiency and unpredictability of ciphertext. At the same time, it can effectively resist the attack of selective plaintext, short plaintext attack and brute force search attack.