Reversible data hiding in Paillier cryptosystem

Hao Tian Wu*, Yiu Ming CHEUNG, Jiwu Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

In this paper, reversible image data hiding in the Paillier cryptosystem is investigated. To transmit additional data in homomorphic encryption domain, two algorithms are proposed for different application scenarios. By exploiting the additive homomorphism, high-capacity data hiding can be accomplished with the first algorithm by conducting value expansion on the encrypted pixel values. But the hidden data can only be extracted after image decryption (i.e., in plain-text domain). With the second algorithm, both of data embedding and extraction can be performed in the encryption domain by exploiting the self-blinding property, while the corresponding plain-text values are unchanged. Compared with the reversible data hiding algorithms designed for encryption with a cipher stream, the proposed ones are more applicable in cloud computing without degrading the security level. Thus the additional data can be losslessly transmitted in the different applications of Paillier cryptosystem.

Original languageEnglish
Pages (from-to)765-771
Number of pages7
JournalJournal of Visual Communication and Image Representation
Volume40
Issue numberPart B
DOIs
Publication statusPublished - 1 Oct 2016

Scopus Subject Areas

  • Signal Processing
  • Media Technology
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering

User-Defined Keywords

  • Homomorphic encryption
  • Paillier cryptosystem
  • Reversible data hiding
  • Self-blinding
  • Value expansion

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