密文域可逆信息隐藏研究进展及技术难点分析

Research Progress and Technical Difficulties of Reversible Data Hiding in Encrypted Domain

密文域可逆信息隐藏技术融合了加密技术和信息隐藏技术的双重优势,旨在实现公开信道上数据内容的隐私保护和信息的可逆嵌入功能,以应对云环境下日益复杂的用户应用需求。本文从密态数据管理、情报隐蔽通信、军事协同作战、技术融合创新4个应用场景分析密文域可逆信息隐藏的研究价值,根据信息嵌入与数据加密的操作关系对密文域可逆信息隐藏分类,对不同嵌入框架下的技术发展进行阐述和总结。同时,从嵌入性能提升、可分离性实现、图像的加密安全性、满足云环境下的应用需求4个方面对密文域可逆信息隐藏的技术难点进行剖析,并对后续研究方向进行分析和展望。

Reversible data hiding in encrypted domain combines the dual advantages of encryption technology and data hiding technology,aiming to achieve privacy protection of data content on public channels,and reversible data embedding,so as to cope with the increasingly complex application requirements in the cloud environment.The research significance of reversible data hiding in encrypted domain is discussed from four application scenarios:encrypted data management,covert communication of intelligence,military collaborative operations,and technological integration innovation.Then,the reversible data hiding in encrypted domain is classified according to the operation relationship between data embedding and data encryption,and the technological development under different embed-ding frameworks is also reviewed.Furthermore,technical difficulties of reversible data hiding in encrypted domain are analyzed from four aspects,including embedding performance improvement,separability implementation,image encryption security,and application requirements for cloud environment.Finally,subsequent research directions are analyzed and prospected.