1. Reversible data hiding in encrypted binary images by pixel prediction
Source: Signal Processing, Vol. 165, pp , December 2019
Authors: Honglin Ren, Wei Lu, and Bing Chen
Speaker: Wang Xu
Date: /08/22

2. Outline
Introduction
Proposed method
Experiment results
Conclusions

3. Introduction (1/2) Encrypted secret data Data hider Secret data
Content owner
Original image
Encrypted image
Embedded, encrypted image
Reserve room before image encryption (RRBE)
Vacate room after image encryption (VRAE)

4. Embedded, encrypted image
Introduction (2/2)
Decrypted image
Secret data
Embedded, encrypted image
Secret data
Original image

5. Proposed method

6. Proposed method

7. Proposed method – preprocessing Rearranging the original imageUB
(uniform block): 1
NUB
(non-uniform block):
… …
(a) The original image
(b) The tags
(b) The type image

8. Proposed method – preprocessing Rearranging the original image

9. Proposed method – Embedding type image

10. Proposed method – Image encryption
Permutation
Permutation

11. Proposed method – Data embedding Data embedding in UBs1
Secret bits :
010
Secret bits :
101
Embedding 1 1

12. Proposed method – Data embedding Data embedding in NUBs

13. Experiment results (1/6)

14. Experiment results (2/6)
[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 .

15. Experiment results (3/6)

16. Experiment results (4/6)

17. Experiment results (5/6)

18. Experiment results (6/6)
[32]
Our
ER (on average)
0.168
0.727
ER (the worst case )
0.236
Reversibility
100%
99.52% of the images (0.168 bpb)
[32] M.S.A. Karim , K. Wong , Universal data embedding in encrypted domain, Signal Process. 94 (2014) 174–182 .

19. Conclusions high embedding capacity complete separability
fine reversibility
good security level

20. Thanks