关键词: 自适应隐写, 邻域相关性, 隐写模型, 抗盲检测, 双层嵌入

Abstract: In order to enhance the statistical security of a data hiding system, the factors that influenced the security of a steganography were analyzed. Three ways to reduce the statistical distortion of the stego-image were found: Increasing embedding efficiency, controlling modifying amplitude and choosing embedding position adaptively. According to the three ways, a new adaptive steganography based on double-layered embedding method was proposed. The new scheme chose pixels under strong noise background as message carrier and embedded secrets in their least significant and second least significant bit-planes. The experimental results on uncompressed images show that the proposed steganography outperforms the prior algorithm for resisting blind steganalysis.

Key words: adaptive steganography, local correlation, embedding model, resisting blind steganalysis, double-layered embedding