Recently, reversible data hiding in encrypted image (RDHEI) has attracted extensive attention, which can be used in secure cloud computing and privacy protection effectively. In this paper, a low-complexity RDHEI scheme based on MSB hierarchical coding and LSB compression is proposed. Content owner first utilizes a specific encryption method, including pixel encrypting, block, and pixel scrambling, to encrypt original image, which not only can reserve the redundancy, but also can mask image contents securely. Through hierarchical encoding MSBs of different types of image blocks and compressing LSBs, data hider can embed additional data into encrypted image effectively. Separable operations of data extraction, image decryption, and image recovery can be conducted on the receiver side based on encryption key and data-hiding key. Experimental results demonstrate that our scheme can achieve better rate-distortion performance than some of state-of-the-art schemes.

中文翻译：

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通过MSB分层编码和LSB压缩在加密图像中隐藏低复杂度可逆数据

近年来，加密图像中的可逆数据隐藏（RDHEI）引起了广泛的关注，它可以有效地用于安全云计算和隐私保护。本文提出了一种基于MSB分层编码和LSB压缩的低复杂度RDHEI方案。内容所有者首先利用特定的加密方法，包括像素加密、分块和像素加扰，对原始图像进行加密，不仅可以保留冗余，而且可以安全地屏蔽图像内容。通过对不同类型图像块的 MSB 进行分层编码并压缩 LSB，数据隐藏器可以有效地将附加数据嵌入到加密图像中。接收端可以根据加密密钥和数据隐藏密钥进行数据提取、图像解密和图像恢复的分离操作。