基于纠错码的密文域鲁棒可逆信息隐藏  

Robust Reversible Information Hiding in Encrypted Domain Based on Error Correcting Code

作　　者：彭菓玉 张敏情[1] 孔咏骏 柯彦[1] PENG Guo-yu;ZHANG Min-qing;KONG Yong-jun;KE Yan(Key Laboratory of Network and Information Security under the Chinese People Armed Police Force(PAP),College of Cryptography Engineering in Engineering University of PAP,Xi’an 710086,China)

机构地区：[1]武警工程大学密码工程学院网络与信息安全武警部队重点实验室

出　　处：《科学技术与工程》2019年第16期205-211,共7页Science Technology and Engineering

基　　金：国家自然科学基金(61379152,61872384)资助

摘　　要：针对目前密文域可逆信息隐藏(reversible data hiding in encrypted domain,RDH-ED)存在嵌入容量较低、鲁棒性差的技术难点,提出一种基于纠错码的密文域鲁棒可逆信息隐藏方法。使用纠错码对低位信息进行编码,然后构造错误图样以嵌入信息。纠错码编码会在原有的图像信息基础上增加监督码元,利用对载体图片像素的高比特位信息进行无损压缩来节余空间,以应对编码后的载体数据量扩展的问题。对于高比特位与低比特位,分别使用不同的加密算法加密,用以保证算法的解密与消息提取的可分离。将图像分块使用投票原则,提高了算法的鲁棒性。在接收端,使用校验矩阵可以准确提取消息,利用纠错码的纠错特性可以实现算法可逆。实验证明,该算法可分离且嵌入率较高,实现了载体完全可逆恢复,具体较好的鲁棒性。At present,there exists series of technical difficulties in reversible data hiding in encrypted domain (RDH-ED),such as low embedding capacity and poor robustness.Based on error-correcting codes,a method of reversible data hiding in encrypted domain was proposed in this paper.Firstly,low-bit information with an error-correcting codes method was encoded,and then information was embedded by constructing error patterns.Supervisory symbols were added to the original image information by error-correcting code coding,lossless compression was used to compress high bit information of carrier image pixels to save space,so as to cope with the problem of data expanding.For the high and low bit,different encryption algorithms were applied to ensure the separation of decryption and message extraction.The voting principle was used in the blocking image,which improves the robustness of the algorithm.At the receiving end,the message can be extracted accurately by using the check matrix,and the algorithm was reversible by using the error-correcting characteristics of the error-correcting codes.Experiments show that the algorithm is separable and has a high embedding rate.It achieves completely reversible recovery of the carrier and has good robustness.

关 键 词：信息安全 可逆信息隐藏 密文域 纠错码 鲁棒 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]