Separable High Capacity Reversible Data Hiding Algorithm for Encrypted Images

The international arab journal of information technology

article

Iyad Jafar¹  Khalid Darabkh¹  Fahed Jubair¹ 

[1] Computer Engineering Department, The University of Jordan

关键词: Encryption;    embedding capacity;    privacy;    reversible data hiding;   

DOI  :  10.34028/iajit/19/5/13

学科分类：计算机科学（综合）

来源: Zarqa University

【 摘 要 】

This paper presents a separable Reversible Data Hiding Algorithm for Encrypted Images (RDHEI) that consists ofthree phases. The encryption phase in the algorithm circularly shifts the columns in the image by a random amount, blocks theimage into equal and regular blocks and maps them to irregular blocks generated based on Hilbert filling curve, and finallycomplements a random subset of the blocks. The embedding phase is essentially an adapted version of the modification of theprediction errors algorithm that is applied to each block in the encrypted image independently. In the decryption phase, andsince the algorithm is separable, the user can extract the data only, decrypt the image only, or can perform both actionsdepending on the type of keys he has. When compared to a very similar and recent algorithm, performance evaluation provedthe ability of the proposed algorithm in increasing the embedding capacity with reasonable quality of the directly decryptedimage. In terms of the security, the analytical and quantitative assessment showed the superiority of the proposed algorithm inprotecting the encrypted image.

【 授权许可】

Unknown