计算机工程 ›› 2020, Vol. 46 ›› Issue (10): 112-119.doi: 10.19678/j.issn.1000-3428.0056281

• 网络空间安全 • 上一篇    下一篇

基于秘密共享的可分离密文域可逆信息隐藏算法

周能, 张敏情, 林文兵   

  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, 西安 710086
  • 收稿日期:2019-10-14 修回日期:2019-11-26 发布日期:2019-12-03
  • 作者简介:周能(1993-),男,硕士研究生,主研方向为密文域可逆信息隐藏;张敏情,教授、博士;林文兵,硕士研究生。
  • 基金项目:
    国家自然科学基金"数字图像隐写检测关键特征的提取和优化理论研究"(61379152);国家自然科学基金"基于加密过程的密文域可逆信息隐藏理论与方法研究"(61872384)。

Separable Reversible Information Hiding Algorithm in Encrypted Domain Based on Secret Sharing

ZHOU Neng, ZHANG Minqing, LIN Wenbing   

  1. Key Laboratory of Network and Information Security Under Chinese People Armed Police Force (PAP), College of Cryptography Engineering, Engineering University of PAP, Xi'an 710086, China
  • Received:2019-10-14 Revised:2019-11-26 Published:2019-12-03

摘要: 为提高密文域可逆信息隐藏的嵌入容量,在秘密共享的基础上,提出一种可分离密文域可逆信息隐藏算法。该算法对原始图像进行位平面分割,并在密文低位平面上利用差值扩展算法嵌入数据,在密文高位平面上通过同态加法嵌入数据。接收者可分别对低位平面和高位平面解密,得到与原始图像近似的解密图像,同时,接收者还可直接在密文低位平面上提取数据,而在高位平面上解密后提取数据,并实现原始图像的可逆恢复。仿真实验结果表明,相比现有可分离算法,该算法具有较高的峰值信噪比,且平均嵌入率达到了0.3 BPP。

关键词: 信息安全, 可逆信息隐藏, 密文域, 秘密共享, 差值扩展

Abstract: In order to improve the embedding capacity of reversible information hiding in encrypted domain,this paper proposes a separable reversible information hiding algorithm in encrypted domain based on secret sharing.Firstly,the original image is segmented according to the bit-planes.Then,the data is embedded into the low bit-planes of the encrypted data by using the Difference Expansion(DE) algorithm,and embedded into the high bit-planes by using homomorphic addition.The receiver decrypts the low bit-planes and high bit-planes respectively to obtain a decrypted image similar to the original image.Also,the receiver can extract data directly in the low bit-planes of the encrypted data,and extract data after the high bit-planes are decrypted,so as to realize the reversible recovery of the original image.Simulation results show that the proposed algorithm has a higher Peak Signal to Noise Ratio(PSNR) than the existing separable algorithms,and its average embedding rate reaches 0.3 BPP.

Key words: information security, reversible information hiding, encrypted domain, secret sharing, Difference Expansion(DE)

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