Block cipher based separable reversible data hiding in encrypted images

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• 作者：Zhenxing Qian ; Xinpeng Zhang ; Yanli Ren ; Guorui Feng
• 关键词：Reversible data hiding ; Image encryption ; Block cipher ; Image recovery
• 刊名：Multimedia Tools and Applications
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：75
• 期：21
• 页码：13749-13763
• 全文大小：1,667 KB
• 刊物类别：Computer Science
• 刊物主题：Multimedia Information Systems
  Computer Communication Networks
  Data Structures, Cryptology and Information Theory
  Special Purpose and Application-Based Systems
  
• 出版者：Springer Netherlands
• ISSN：1573-7721
• 卷排序：75

文摘

While most reversible data hiding in encrypted images (RDH-EI) are based on stream cipher, this paper aims to present an alternative method feasible for block-enciphered images. Before uploading data to a remote server, the content owner encrypts the original image with a block cipher algorithm using an encryption key. Then, the server embeds additional bits into the encrypted image with an embedding key to generate the marked encrypted image. On the recipient side, the additional bits can be extracted if the receiver has the embedding key. In case the receiver has only the encryption key, the marked encrypted image can be directly deciphered to a plaintext image with good quality. When both the embedding and encryption keys are available for the receiver, he can recover the original image without any errors. Compared with the existing block cipher based RDH-EI method, drawbacks of the encryption and the recovery are avoided, and good embedding payloads are achieved.