【摘要】 提出一种基于分组密码的加密域信息隐藏方法，对图像像素转换之后的数据，高七位采用分组密码DES进行加密，最低位利用LSB算法完成信息隐藏。由于DES算法是分组加密，加密过程更加复杂，对图像产生的加密效果更明显；而信息隐藏方面采用最低位的置换，对图像视觉上没有造成影响，可实现秘密信息的隐藏。通过实验证明，算法操作简单，可实行性高，图像解密与信息提取过程互不影响，在接收端对于两者的顺序没有限制，满足可分离要求；除此之外还具有秘密信息能够无损恢复，算法安全性较高等显著优点。更多还原

【Abstract】 In this paper, a block cipher-based method for information hiding in encryption domain is proposed. For the data converted from image pixels, the high seven bits are encrypted by block cipher DES, and the lowest part is hidden by LSB algorithm. Because DES algorithm is packet encryption, the encryption process is more complex, and the encryption effect on the image is more obvious. In the aspect of information hiding, the lowest displacement is adopted, which has no impact on the image vision, and the secret information can be hidden. The experimental results showed that the algorithm is simple in operation, high in practicability, meets the concept of separability, and has no restrictions on the sequence of image decryption and information extraction at the receiver. In addition, the algorithm also has significant advantages of non-destructive recovery of secret information and higher security.更多还原