Reversible data hiding in encrypted binary images by
Reversible data hiding in encrypted binary images by pixel prediction Source: Signal Processing, Vol. 165, pp. 268 -277, December 2019 Authors: Honglin Ren, Wei Lu, and Bing Chen Speaker: Wang Xu Date: 2019/08/22
Outline • Introduction • Proposed method • Experiment results • Conclusions
Introduction (1/2) Encrypted secret data Data hider Secret data Content owner Original image Encrypted image Reserve room before image encryption (RRBE) Embedded, encrypted image Vacate room after image encryption (VRAE) 3
Introduction (2/2) Decrypted image Secret data Embedded, encrypted image Secret data Original image 4
Proposed method 5
Proposed method 6
Proposed method – preprocessing Rearranging the original image UB (uniform block): 1 (a) The original image …… (b) The tags NUB (non-uniform block): 0 (b) The type image 7
Proposed method – preprocessing Rearranging the original image 8
Proposed method – Embedding type image 9
Proposed method – Image encryption Permutation 10
Proposed method – Data embedding in UBs Secret bits : 010 1 1 Secret bits : 101 0 0 Embedding 0 1 1 0 11
Proposed method – Data embedding in NUBs 12
Experiment results (1/6) 13
Experiment results (2/6) 14 [31] B. Feng , W. Lu , W. Sun , Secure binary image steganography based on minimizing the distortion on the texture, IEEE Trans. Inf. Forensics Secur. 10 (2) (2015) 243– 255.
Experiment results (3/6) 15
Experiment results (4/6) 16
Experiment results (5/6) 17
Experiment results (6/6) ER (on average) [32] Our 0. 168 0. 727 ER (the worst case ) Reversibility 0. 236 100% 99. 52% of the images (0. 168 bpb) 18 [32] M. S. A. Karim , K. Wong , Universal data embedding in encrypted domain, Signal Process. 94 (2014) 174– 182.
Conclusions Øhigh embedding capacity Øcomplete separability Øfine reversibility Øgood security level 19
Thanks
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