Separable Reversible Data Hiding in Encrypted JPEG Bitstreams
Separable Reversible Data Hiding in Encrypted JPEG Bitstreams
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DOI：
10.1109/tdsc.2016.2634161
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发表时间：
2018-11
影响因子：
7.3
通讯作者：
Zhenxing Qian;Hang Zhou;Xinpeng Zhang;Weiming Zhang
中科院分区：
文献类型：
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作者：
Zhenxing Qian;Hang Zhou;Xinpeng Zhang;Weiming Zhang
虽然大多数加密图像中的可逆数据隐藏（RDH-EI）技术是针对未压缩图像开发的，但本文提供了一种可分离的加密JPEG比特流可逆数据隐藏协议。我们首先提出一个JPEG加密演算法，将影像加密到较小的尺寸，并保持格式符合JPEG解码器。在内容所有者将加密的JPEG比特流上传到远程服务器之后，数据隐藏器在不改变比特流大小的情况下将附加消息嵌入到加密副本中。在接收侧，可以使用基于块效应的迭代恢复算法来无损地重建原始比特流。由于消息提取和图像恢复是可分离的，因此任何拥有嵌入密钥的人都可以从标记的加密副本中提取消息。实验结果表明，该方法在分离能力、嵌入能力和安全性方面均优于已有的方法。
While most techniques of reversible data hiding in encrypted images (RDH-EI) are developed for uncompressed images, this paper provides a separable reversible data hiding protocol for encrypted JPEG bitstreams. We first propose a JPEG encryption algorithm, which enciphers an image to a smaller size and keeps the format compliant to JPEG decoder. After a content owner uploads the encrypted JPEG bitstream to a remote server, a data hider embeds an additional message into the encrypted copy without changing the bitstream size. On the recipient side, the original bitstream can be reconstructed losslessly using an iterative recovery algorithm based on the blocking artifact. Since message extraction and image recovery are separable, anyone who has the embedding key can extract the message from the marked encrypted copy. Experimental results show that the proposed method outperforms a previous work in terms of separation capability, embedding capacity and security.