Fast Carrier Selection of JPEG Steganography Appropriate for Application  

作　　者：Weixiang Ren Yibo Xu Liming Zhai Lina Wang Ju Jia 

机构地区：[1]the Key Laboratory of Aerospace Information Security and Trusted Computing,Ministry of Education,Wuhan University,Wuhan 430000,China [2]the School of Cyber Science and Engineering,Wuhan University,Wuhan 430000,China [3]Micropattern Co.Ltd.,Wuhan 430000,China

出　　处：《Tsinghua Science and Technology》2020年第5期614-624,共11页清华大学学报（自然科学版（英文版）

基　　金：supported by the National Key Program of Natural Science Foundation of China(No.U1536204);the National Natural Science Foundation of China(Nos.U1836112,61876134,and 61872275)。

摘　　要：In recent years,the improvement of the security of steganography mainly involves not only carrier security but also distortion function.In the actual environment,the existing method of carrier selection is limited by its complex algorithm and slow running speed,making it not appropriate for rapid communication.This study proposes a method for selecting carriers and improving the security of steganography.JPEG images are decompressed to spatial domain.Then correlation coefficients between two adjacent pixels in the horizontal,vertical,counter diagonal,and major diagonal directions are calculated.The mean value of the four correlation coefficients is used to evaluate the security of each JPEG image.The images with low correlation coefficients are considered safe carriers and used for embedding in our scheme.The experimental results indicate that the stego images generated from the selected carriers exhibit a higher anti-steganalysis capability than those generated from the randomly selected carriers.Under the premise of the same security level,the images with low correlation coefficients have a high capacity.Our algorithm has a very fast running speed,and the running time of a 2048×2048 image is less than 1 s.In recent years,the improvement of the security of steganography mainly involves not only carrier security but also distortion function.In the actual environment,the existing method of carrier selection is limited by its complex algorithm and slow running speed,making it not appropriate for rapid communication.This study proposes a method for selecting carriers and improving the security of steganography.JPEG images are decompressed to spatial domain.Then correlation coefficients between two adjacent pixels in the horizontal,vertical,counter diagonal,and major diagonal directions are calculated.The mean value of the four correlation coefficients is used to evaluate the security of each JPEG image.The images with low correlation coefficients are considered safe carriers and used for embedding in our scheme.The experimental results indicate that the stego images generated from the selected carriers exhibit a higher anti-steganalysis capability than those generated from the randomly selected carriers.Under the premise of the same security level,the images with low correlation coefficients have a high capacity.Our algorithm has a very fast running speed,and the running time of a 2048×2048 image is less than 1 s.

关 键 词：STEGANOGRAPHY STEGANALYSIS CARRIER JPEG correlation coefficients 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]