Abstract: An improved image hidding method is proposed based on chaotic sequence and bit operation.Firstly，chaotic sequences are generated based on logisitc mapping and applied to pre-encrypt the image，including improved magic-cube scrambling and pixels permutation；then further processing are used to hide the pre-encrypted image based on bit operation.The effect of hidding is also analyzed by using the method of accessing.Simulation results indicate that the method has good efficiency and security characteristic.

摘要： 提出了一种改进的数字图像隐藏方法。首先应用混沌系统产生混沌序列，用此混沌序列对原始图像做预处理加密，即做改进的魔方置乱和像素置换；然后对结果图像做进一步基于位运算的隐藏；最后应用评价指标对隐藏效果和安全性进行分析。实验结果表明，该方法具有较高的安全性以及加密效率。