This paper proposes a scheme of reversible data hiding in encrypted images based on multikey encryption. There are only two parties that are involved in this framework, including the content owner and the recipient. The content owner encrypts the original image with a key set which is composed by a selection method according to the additional message. Thus, the image can be encrypted and embedded at the same time. Additional message can be extracted given that the recipient side could perform decryption strategy by exploiting spatial correlation; then, original image can be recovered without any loss. Compare with other current information hiding mechanism, the proposed approach provides higher embedding capacity and is also able to perfectly reconstruct the original image as well as the embedded message. Rate distortion of the proposed method outperforms the previously published ones.

中文翻译：

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基于多密钥加密的可逆信息隐藏算法

本文提出了一种基于多密钥加密的可逆数据隐藏在加密图像中的方案。此框架只有两个参与方，包括内容所有者和接收方。内容所有者使用密钥集对原始图像进行加密，该密钥集由选择方法根据附加消息组成。因此，可以同时加密和嵌入图像。假设接收方可以通过利用空间相关性执行解密策略，则可以提取其他消息；这样就可以恢复原始图像而不会造成任何损失。与现有的其他信息隐藏机制相比，该方法具有更高的嵌入能力，并且能够完美地重构原始图像以及嵌入的消息。