The rapid development and growing of 4G and 5G mobile networks allow people all over the world to efficiently transmit and share data and information while bringing an increasing demand on information security. Data hiding is a general technique to embed secret messages to be protected in an imperceptible way into a cover media like an image, a video stream, or a document. Traditional data hiding intends to achieve high embedding capacity and imperceptibility of hidden secret messages for secure communication. However, it introduces permanent damage or distortion to the cover media when receiver extracts the secret messages from the cover media. To address this problem, reversible data hiding (RDH) was developed to allow the receiver completely extract the hidden secret messages while fully recovering the original cover media without any distortion. RDH has been widely used for many military and medical applications like the access authentication of reconnaissance images and the sharing of medical images in remote diagnosis. According to the format of cover media, RDH can be done in both plaintext and encryption domains. RDH in plaintext domain intends to embed the secret messages into the original cover media in a way that the marked media (the cover media with embedded secret messages) is visually the same as the original cover media and able to withstand the potential analysis. RDH in the encryption domain embeds the secret messages into the encrypted cover media (e.g., encrypted images) such that secret messages and cover media are protected in a high security level during transmission and completely reconstructed in the receiver side.

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现代可逆数据隐藏和水印专题的客座编辑介绍

4G和5G移动网络的快速发展和壮大，让世界各地的人们能够高效地传输和共享数据和信息，同时也带来了对信息安全的日益增长的需求。数据隐藏是一种通用技术，可将要保护的秘密消息以难以察觉的方式嵌入到封面媒体（如图像、视频流或文档）中。传统的数据隐藏旨在实现隐藏秘密消息的高嵌入能力和不可察觉性，以实现安全通信。然而，当接收者从封面媒体中提取秘密信息时，它会对封面媒体造成永久性损坏或扭曲。为了解决这个问题，可逆数据隐藏（RDH）的开发是为了让接收者完全提取隐藏的秘密信息，同时完全恢复原始封面媒体而不会产生任何失真。RDH已广泛应用于许多军事和医疗应用，例如侦察图像的访问认证和远程诊断中的医学图像共享。根据封面媒体的格式，RDH 可以在明文域和加密域中进行。明文域中的 RDH 旨在将秘密消息嵌入到原始封面媒体中，使标记媒体（带有嵌入秘密消息的封面媒体）在视觉上与原始封面媒体相同，并且能够承受潜在的分析。加密域中的 RDH 将秘密消息嵌入到加密的封面媒体中（例如，