An Improved Reversible Data Hiding in Encrypted Image

An Improved Reversible Data Hiding in Encrypted Image Method Based on Block Selection Source: IEEE Access, 14 December 2020 Author: Yaomin Wang; Gangqiang Xiong; Wenguang He Speaker: Chi Hengxiao Date: 2021/02/25 1

Outline • Related works • Proposed scheme • Experimental results • Conclusions 2

Related works(1/6) 49 54 s=4 52 49 50 51 54 47 50 49 54 47 50 51 51 47 54 54 50 47 N 0 50 52 50 47 s=4 49 51 50 51 N 1 52=00110100 0011=51 51 53 53 If Secret=1 40 54 52 53 52 N 1’ 51 49 53 51 54 47 53 54 54 40 50 52 54 47 53 52 3

Related works(2/6) 49 54 47 54 51 49 53 51 54 47 53 54 54 40 50 52 54 47 53 52 54 51 54 49 50 40 49 47 49 53 40 H 0 N 0’ 51 53 53 40 52 N 1’ 50 54 52 53 52 52 50 47 49 51 50 51 H 1 f 0=0. 75+2=13. 5 f 1=0. 5+2. 75=3. 55 f 0>f 1 4

Related works(3/6) 54 49 40 49 49 52 49 54 53 47 54 40 54 51 50 47 H 0 52 50 50 47 49 51 50 H 1 51 52 49 50 51 54 47 50 49 54 47 50 51 5

Related works(4/6) 46 43 s=4 46 46 50 50 43 43 50 47 44 44 55 51 44 44 55 66 50 43 44 44 55 44 N 0 50 46 50 44 s=4 47 51 55 66 N 1 46=00101110 00101001=41 41 53 53 If Secret=1 43 40 52 48 69 N 1’ 41 46 53 50 43 43 53 40 44 43 55 52 44 44 48 69 6

Related works(5/6) 46 43 43 44 41 46 53 50 43 43 53 40 44 43 55 52 44 44 48 69 44 50 41 44 55 44 43 48 43 H 0 N 0’ 41 53 53 43 46 N 1’ 50 40 52 48 53 69 50 44 47 51 55 66 H 1 f 0=0. 75+2=2. 75 f 1=0. 5+2. 75=3. 25 f 0<f 1 7

Related works(6/6) [21] X. Zhang, ``Reversible data hiding in encrypted image, '' IEEE Signal Process. Lett. , vol. 18, no. 4, pp. 255258, Apr. 2011. [22] W. Hong, T. -S. Chen, and H. -Y. Wu, ``An improved reversible data hiding in encrypted images using side match, '' IEEE Signal Process. Lett. , vol. 19, no. 4, pp. 199202, Apr. 2012. [23] X. Liao and C. Shu, ``Reversible data hiding in encrypted images based on absolute mean difference of multiple neighboring pixels, '' J. Vis. Commun. Image Represent. , vol. 28, pp. 2127, Apr. 2015. [24] F. -T. -Z. Khanam, K. -Y. Song, and S. Kim, ``A modied reversible data hiding in encrypted image using enhanced measurement functions, '' in Proc. 8 th Int. Conf. Ubiquitous Future Netw. (ICUFN), Jul. 2016, pp. 869872. [25] R. Bhardwaj and A. Aggarwal, ``An improved block based joint reversible data hiding in encrypted images by symmetric cryptosystem, '' Pattern Recognit. 8 Lett. , vol. 139, pp. 6068, Nov. 2020.

Proposed scheme(1/9) extraction-correct-block(ECB) 9

Proposed scheme(2/9)—ECB 10

Proposed scheme(3/9)—ECB 46 46 50 50 43 43 50 47 44 44 55 51 44 44 55 66 f 1=64 f 2=47 11

Proposed scheme(4/9)—ECB 46 46 50 50 43 43 50 47 44 44 55 51 44 44 55 66 f 1=64 f 2=47 f 3=45 f 4=58 F=f 1+f 2+f 3+f 4=214 12

Proposed scheme(5/9)—ECB F=f 1+f 2+f 3+f 4=214 46 46 50 50 43 43 50 47 44 44 55 51 44 44 55 66 41 41 53 53 44 44 53 40 43 43 48 52 43 43 48 69 46=00101110 00101001=41 F’=f’ 1+f’ 2+f’ 3+f’ 4=322 D=F-F’=214 -322=-108<0 13

Proposed scheme(6/9)—PF&SELFEMBEDDING 46 46 50 50 43 43 50 47 44 44 55 51 44 44 55 66 46=00101110 1 0 0 0 1 5 5 6 6 1 0 5 5 6 5 5 5 6 6 5 5 6 8 position file (PF) 00101=5 14

Proposed scheme(7/9)—SELFEMBEDDING 5 5 6 6 5 5 6 8 15

Proposed scheme(8/9)—SELFEMBEDDING 5 5 6 6 5 5 6 8 1 0 0 0 0 0 1 4 5 7 8 1 5 4 7 5 0 5 4 7 7 5 5 7 10 position file (PF) 16

Proposed scheme(9/9)—SELFEMBEDDING 4 5 7 8 5 4 7 5 5 4 7 7 5 5 7 10 5 5 6 6 5 5 6 8 1 0 0 0 1 0 0 sort PF=10010000 17

Experimental results (1/3) 18

Experimental results (2/3) 19

Experimental results (3/3) 20

Conclusions • Extraction-correct-block(ECB) • Reversible & High Embedding Capacity 21

Thanks for your listening! 22