基于Piecewise映射的安全密文域可逆信息隐藏算法  

security reversible data hiding algorithm in encrypted domain based on Piecewise chaotic mapping

作　　者：万洪莉 张敏情[1,2] 柯彦[1,2] 蒋宗宝[1,2] 狄富强 姜超 WAN Hongli;ZHANG Minqing;KE Yan;JIANG Zongbao;DI Fuqiang;JIANG Chao(College of Cryptography Engineering,Engineering University of PAP,Xi’an 710086,China;Key Laboratory of PAP for Cryptology and Information Security,Xi’an 710086,China)

机构地区：[1]武警工程大学密码工程学院,陕西西安710086 [2]中国人民武装警察部队密码与信息安全保密重点实验室,陕西西安710086

出　　处：《现代电子技术》2024年第14期1-8,共8页Modern Electronics Technique

基　　金：国家自然科学基金项目(62272478);国家自然科学基金项目(62102450);国家自然科学基金项目(62102451);国家社会科学基金项目(2022-SKJJ-C-091);国防科技自主科研项目:智能信息隐藏技术及某领域应用研究。

摘　　要：密文域可逆信息隐藏(RDH-ED)中常采用对称加密,但仅采用流密码异或(XOR)、置乱或两者结合的方法,在现有条件下难以抵抗唯密文攻击、选择明文攻击或已知明文攻击(KPA)。为了提高RDH-ED的安全性,提出一种基于Piecewise混沌映射的安全RDH-ED加密算法。首先对明文图像进行分块并按比特异或,随后利用Piecewise混沌映射转换密钥来对异或后的图像进行块内位平面置乱,最后对图像进行块间置乱加密。实验结果表明:所提算法在能够达到像素值均匀分布、视觉上不可感知的基础上,密钥空间相比单一加密方式增大至2^(8N_(p))×N_(p)!×8!^(N_(p)),并能够抵抗现有的各类攻击方法;最近的KPA测试下破解率为0.0067%,在保留适当嵌入量的同时增强了图像的安全性。同时,该算法通过Piecewise映射使得密钥通信量不变,并能够保证完全可逆地恢复原始图像。Symmetric encryption is often used in reversible data hiding in encrypted domain(RDH-ED).However,it has been proved that it is difficult to resist ciphertext-only attack,chosen-plaintext attack or known-plaintext attack(KPA)under the existing conditions by using only stream cipher XOR,scrambling or a combination of the two methods.Therefore,in order to improve the security of RDH-ED,a secure RDH-ED algorithm based on Piecewise chaotic mapping is proposed.The plaintext image is divided into blocks and XOR in bit units.The Piecewise chaotic mapping conversion key is used to perform intra block bitplane scrambling on the XOR image,and inter block scrambling encryption on the image.The experimental results show that the key space of the algorithm is increased to 2^(8N_(p))×N_(p)!×8!^(N_(p))compared with the single encryption method on the basis of being visually imperceptible and achieve the uniform distribution of pixel values,and it can resist the existing various attack methods.The cracking rate under the recent KPA test is 0.0067%,which can enhance the security of the image while retaining the appropriate embedding amount.At the same time,after the Piecewise mapping,the key communication traffic does not change,and the original image can be restored completely and reversibly.

关 键 词：密文域可逆信息隐藏 Piecewise混沌映射 异或加密 置乱加密 图像加密 信息嵌入 抗攻击性 

分 类 号：TN918.4-34[电子电信—通信与信息系统] TP309[电子电信—信息与通信工程]