密文图像中的可逆信息隐藏

项目名称： 密文图像中的可逆信息隐藏

项目编号： No.61472235

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 张新鹏

作者单位： 上海大学

项目金额： 83万元

中文摘要： 密文域可逆信息隐藏既可实现密文数据中的信息隐藏，又可实现原始明文载体的无误恢复，是新兴研究热点。本项目针对数字图像开展密文域可逆信息隐藏的理论研究、框架研究、方法研究和应用研究。率失真性能是可逆信息隐藏的重要指标，本项目首先发展密文图像可逆信息隐藏的新理论，借助明文数据模型和加密密钥可用条件给出密文域可逆嵌入的可达率失真性能。其次建立明文域提取和密文域提取两类方案的统一框架，通过构建密文数据修改与密文数据压缩的对偶关系，实现两类方案的互相转换。并协调加密-嵌入-提取/恢复三方面机制，提出可对载体数据进行动态调整的密文图像可逆信息隐藏新方法，通过多参数优化提高率失真性能。本项目还将开拓密文图像可逆信息隐藏的新应用，包括利用块间相关性的JPEG密文图像可逆信息隐藏方法及密文域嵌入、明文域可见的可逆水印方法。项目成果将全面推动密文域可逆信息隐藏的发展。

中文关键词： 信息隐藏；可逆信息隐藏；数字图像；图像加密

英文摘要： Reversible data hiding in encrypted domain is an emerging technology aimed at embedding additional information into cipher-data without revealing the plaintext content and recovering the original plaintext content without any error at receiver side. This project will focus on the research on theory, framework, methodology and applications on reversible data hiding in encrypted images (RDHEI). Firstly, we will develop new theory about RDHEI to give the achievable rate-distortion performance suitable for the statistical properties of plaintext image data and the usability of cryptographic key. Secondly, we will propose a generalized framework for the two types of schemes by construct a duality relationship between the modification on encrypted data and the compression of encryption data, so that the embedded information can be extracted in both the encrypted and the plaintext domains. Thirdly, we will propose novel methods on RDHEI by harmonizing three phases, which include the image-encryption, data-embedding and data-extraction/content-recovery, by introducing a mechanism of adaptive modification on cover data and by optimizing the systemic parameters, so that the improved actual rate-distortion performance can be realized. At last, we will study new techniques for special application scenarios, including reversible data hiding in encrypted JPEG images and reversible visible watermarking in encrypted images. The achievements of this project will be significantly meaningful for research on reversible data hiding in encrypted domain.

英文关键词： Data hiding;Reversible data hiding;Digital image;Image encryption