面向移动平台的安全可逆信息隐藏中若干关键技术研究

作为一种可实现数据内容完整性认证的信息安全技术，可逆信息隐藏算法（简称“可逆算法”）近年来得到了迅猛的发展。然而，目前主流的可逆算法研究均集中在提高性能方面，在“安全”层面的研究明显不足，导致其实用价值受到了较大的影响。基于此，本项目拟研究当前两种不同场景下可逆算法的若干安全问题，具体包含：（1）“检测技术”研究：本项目拟构建一个集“嵌入痕迹挖掘”、“检测特征设计”、“虚检漏检监测”于一体的低复杂度检测技术，并重点分析不同场景下嵌入痕迹的表达形式及检测特征的稳定性问题，揭示现有算法的安全缺陷；（2）“安全算法”设计：拟构建多套以“高相似度匹配”和“检测特征保持”为理念的安全可逆嵌入新框架，抵抗检测技术的分析，并借鉴“隐写”领域的失真函数设计思路，研究安全嵌入位置的优化选择问题。本项目的研究为后续可逆算法的发展提供新的思路，为移动平台下的数据安全提供有力的保障。

As an information security technique that can anthenticate the carrier content integrity, reversible data hiding (RDH) has rapidly developed in recent years. However, current reversible data hiding schemes focus on high performance, i.e., high capacity and low distortion, instead of its security level, which results in illegal abuse of data hiding techniques on the mobile platform. Therefore, this proposal attempts to study some detection techniques and other anti-detection ones for two different kinds of reversible data hiding schemes, i.e.,‘traditional reversible data hiding algorithm with imperceptible visual distortion’ and ‘reversible data hiding algorithm with image contrast enhancement’. Specifically, it includes: 1) ‘Design of RDH based detection technique’ to judge whether some undesired secret data is hided in the carrier on mobile platform. This project intends to build an efficient detection technique, which includes "data hiding trace mining", "detection feature design" and "false detection judgement", and significantly study how to explore those reversible data hiding trace for different kinds of RDH and analyze the stability of those designed detection features; (2) ‘Design of anti-detection technique' to build a novel RDH scheme with high security level, which could avoid the detection technique by achieving high similarity matching and keeping detection features unchangeable as possible during the data hiding process. To further improve its security, some field knowledge form Steganalysis, i.e., the design of the distortion function, could be referred to determine desired data hiding location. Via this proposal, a new direction would be developed for the RDH research and meanwhile a novel scheme could be provided to protect the data for mobile platform.