A channel selection rule for YASS  

作　　者：YU LiFang ZHAO Yao NI RongRong CAO Gang 

机构地区：[1]Institute of Information Science,Beijing Jiaotong University [2]School of Computer Science,Communication University of China

出　　处：《Science China(Information Sciences)》2014年第8期148-157,共10页中国科学（信息科学）（英文版）

基　　金：supported in part by the 973 Program(2011CB302204);the National Natural Science Fundation for Distinguished Young Scholar(61025013);the National Natural Science Foundation of China(61210006,61272355);PCSIRT(IRT 201206)

摘　　要：In this paper, a channel selection rule for YASS （Yet-Another-Secure-Steganography） is proposed. Secret message embedding imposes distortion to the cover image. The larger the distortion, the less secure the steganographic algorithm. Our channel selection rule engages in minimizing this distortion brought in by YASS. In our rule, the distortion caused by unit change on each quantized DCT （Discrete Cosine Transformation） component is computed, and the components with smaller unit change distortion are selected with higher priority. This channel selection rule reduces distortion to the medium spatial domain image and the final JPEO image. Experimental results show that our improved YASS scheme outperforms original YASS scheme on the aspects of both perception and statistics. This new channel selection rule can also be combined with other enhancements in YASS framework to further boost the performance.In this paper, a channel selection rule for YASS （Yet-Another-Secure-Steganography） is proposed. Secret message embedding imposes distortion to the cover image. The larger the distortion, the less secure the steganographic algorithm. Our channel selection rule engages in minimizing this distortion brought in by YASS. In our rule, the distortion caused by unit change on each quantized DCT （Discrete Cosine Transformation） component is computed, and the components with smaller unit change distortion are selected with higher priority. This channel selection rule reduces distortion to the medium spatial domain image and the final JPEO image. Experimental results show that our improved YASS scheme outperforms original YASS scheme on the aspects of both perception and statistics. This new channel selection rule can also be combined with other enhancements in YASS framework to further boost the performance.

关 键 词：STEGANOGRAPHY STEGANALYSIS YASS channel selection DC components embedding distortion 

分 类 号：TN919.81[电子电信—通信与信息系统]