针对图像空域随机LSB信息隐藏的提取攻击策略

针对图像空域随机LSB信息隐藏的提取攻击策略 Stego Key Estimation in Image Spatial Random LSB Steganography 王丽娜 WANG Lina 1 2 first-author 王旻杰 WANG Minjie 1 2 章鑫 ZHANG Xin 1 2 翟黎明 ZHAI Liming 1 2 徐一波 XU Yibo 1 2 武汉大学计算机学院 武汉大学计算机学院 School of Computer,Wuhan University School of Computer,Wuhan University 武汉大学空天信息安全与可信计算教育部重点实验室 武汉大学空天信息安全与可信计算教育部重点实验室 Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education,Wuhan University Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education,Wuhan University 针对图像空域随机LSB信息隐藏,重点研究隐写嵌入对隐写轨迹上像素间关联性的影响,通过提取隐写密钥对应的隐写轨迹上像素多方向关联化互信息特征,在互信息值与隐写密钥间建立映射对应关系,从而在隐写密钥空间内甄别出真伪隐写密钥,最终实现提取攻击获得隐写密钥.在隐写密钥提取攻击测试中表明,本文提出的方法能够针对随机LSB替换和随机LSB匹配嵌入实现提取攻击,与现有的提取攻击方法相比具有更高的提取攻击准确率,在不同的图像集下能够保持较好的隐写密钥提取攻击效果. In this paper,we focus on the effects of steganographic embedding to the correction among steganography pixels on track against the spatial random LSB image steganography.Then,for each stego key in the keyspace,a multi-directional associative mutual information（MAMI）feature has been extracted on the track which controlled by the stego key.And,a mapping correspondence between MAMI feature and stego key is established.According to this approach,the correct key can be identified in the stego keyspace.The experimental results demonstrate that the method which has been introduced can estimate the stego key in random LSB replacement embedding and random LSB matching embedding.The method has better accuracy of detection accuracy compared with existing methods and it can ensure the great effects in various kinds of image sets. 隐写分析 信息隐藏 空域随机LSB嵌入 提取攻击 steganalysis information hiding spatial random LSB embedding stego-key estimation 10.14188/j.1671-8836.2015.01.005 TP309;TP391.41 国家自然科学基金（61373169,61272453,61103219）;教育部博士点基金优先发展领域项目（20110141130006）资助 2015-01-01 2021-03-31 1 61