【摘要】 自适应隐写可避免修改载体的敏感区域,有效提高隐写术的安全性.总结分析了现有自适应隐写的边信息同步方法.通过推广单调纹理函数思想,构造一种基于自由度的纹理保序函数,实现了自适应隐写边信息的快速同步.结合湿纸编码和多层嵌入思想,提出自适应±1和±2隐写算法.新算法既保证通信双方能快速同步边信息,同时具有很高的抗检测性能.理论分析和实验结果均表明了算法的有效性.更多还原

【Abstract】 Adaptive steganography which avoids changing the sensitive area in carrier, can efectively improve the security of steganography. Firstly, the schemes of side information synchronization in adaptive steganography are summarized and analyzed. Secondly, using the freedom degree which is extented by the previous one-way texture functions, a new orderpreserving texture function as side information of adaptive steganography is constructed. Finally, by combining wet paper codes and the method of multi-layered embedding, ± 1 algorithm and ± 2 algorithm are proposed. The proposed scheme can efciently enhance the security of adaptive steganography while maintaining fast side information synchronization between communicators. Theoretical analysis and experimental results show the efciency of the proposed scheme.更多还原