一种基于改进的Logistic映射的数据不变长加密算法

AN ENCRYPTION ALGORITHM KEEPING DATA LENGTH UNCHANGED BASED ON MODIFIED LOGISTIC MAP

针对数据不变长加密,提出一种基于改进的Logistic映射的加密算法。利用该映射产生的混沌序列所特有的不可预测性,对序列X进行不变长加密。即明文X的Bit长度为n,用该算法对X进行加密运算后得到的密文Y的Bit长度还是n。实验结果表明,该算法效率高,内存消耗少,抗攻击性强,且普遍适用于不改变数据长度需求的加解密应用。

An encryption algorithm keeping data length unchanged based on modified Logistic map is proposed for encryption with length unchanged. By using the unpredictability of the chaotic sequence generated by this mapping,the sequence X is encrypted with data length unchanged. The bit length of plaintext X is n,and the bit length of ciphertext Y obtained after the algorithm is used to encrypt X is n. Experimental results show that the algorithm is efficient,less memory consumption,strong anti-attack,and is generally applicable to the encryption and decryption applications without changing the data length requirements.