Netinfo Security ›› 2021, Vol. 21 ›› Issue (4): 73-80.doi: 10.3969/j.issn.1671-1122.2021.04.008

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Research on Technology of Reversible Data Hiding in Encrypted Domain Based on Homomorphic Encryption

LIN Wenbing1,2, ZHANG Minqing1,2(), ZHOU Neng1,2, KONG Yongjun1,2   

  1. 1. College of Cryptography Engineering, Engineering University of Chinese People Armed Police Force(PAP), Xi’an 710086, China
    2. Key Laboratory of Network and Information Security under PAP, Xi’an 710086, China
  • Received:2020-11-06 Online:2021-04-10 Published:2021-05-14
  • Contact: ZHANG Minqing E-mail:api_zmq@126.com

Abstract:

In order to improve the embedding capacity and realize the separability of decryption and information extraction, the algorithm applies the characteristics of Hilbert curve and homomorphic encryption to reversible data hiding in the encrypted domain. First, the image owner preprocesses the original image and constructs the ciphertext mirror point (CMP) after encryption. Then, the data hider embeds the secret information on the target pixel through homomorphic addition. Finally, the receiver can not only extract the secret information, but also restore the original image lossless. Experiments have proved that this scheme can not only realize the separability of decryption and extraction of information, but also the maximum embedding capacity can reach 69120 bits under the guarantee of image quality.

Key words: reversible data hiding, homomorphic encryption, hilbert curve, prediction error expansion

CLC Number: