Data Hiding system Cover image Stego image 10101

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Data Hiding system Cover image Stego image 10101 00101 11100 Secret message 2

Data Hiding system Cover image Stego image 10101 00101 11100 Secret message 2

Cover Carriers Image n Video n Sound n Text n 3

Cover Carriers Image n Video n Sound n Text n 3

VQ Encoding (120, 155, …, 80) (90, 135, …, 120) (100, 125, …, 150)

VQ Encoding (120, 155, …, 80) (90, 135, …, 120) (100, 125, …, 150) … Original Image 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Index table (49, 117, …, 25) (50, 42, …, 98) (20, 65, …, 110) Codebook 4

Previous Work of Steganography on VQ To find the closest pairs 5

Previous Work of Steganography on VQ To find the closest pairs 5

d(CW 0, CW 8) > TH d(CW 13, CW 14) > TH CW 0,

d(CW 0, CW 8) > TH d(CW 13, CW 14) > TH CW 0, CW 8, CW 13, CW 14 Unused CW 1 , CW 2 CW 4, CW 5 CW 6, CW 7 1 CW 11 , CW 3 CW 15, CW 10 CW 12, CW 9 0 6

Encode Index Table Original Image CW 0, CW 8, CW 13, CW 14 Unused

Encode Index Table Original Image CW 0, CW 8, CW 13, CW 14 Unused Index Table 7

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 1 1 0 1 0 Index Table CW 1, CW 2, CW 4, CW 5 CW 6, CW 7 1 Secret bits CW 11, CW 3 CW 15, CW 10 CW 12, CW 9 0 8

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 1 1 0 1 0 Index Table CW 1, CW 2, CW 4, CW 5 CW 6, CW 7 1 Secret bits CW 11, CW 3 CW 15, CW 10 CW 12, CW 9 0 9

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 1 1 0 1 0 Index Table Secret bits 10

Limitations of the Previous Work n Irreversible ¨ Original index values can not be

Limitations of the Previous Work n Irreversible ¨ Original index values can not be recovered after extraction 11

Find the most dissimilar pairs (De-clustering) CW 2 CW 9 CW 3 CW 10

Find the most dissimilar pairs (De-clustering) CW 2 CW 9 CW 3 CW 10 CW 4 CW 11 CW 5 CW 12 CW 6 CW 13 CW 7 CW 14 1 0 Dissimilar … CW 8 … CW 1 12

Encode Index Table Original Image 13

Encode Index Table Original Image 13

Embedding Using Side-Match CW 1 CW 8 : Dissimilar Pair Assume X = CW

Embedding Using Side-Match CW 1 CW 8 : Dissimilar Pair Assume X = CW 1 V 0 = ((U 13+L 4)/2, U 14, U 15, U 16, L 8, L 12, L 16) V 1 = (X 1, X 2, X 3, X 4, X 5, X 9, X 13)CW 1 V 8 = (X 1, X 2, X 3, X 4, X 5, X 9, X 13)CW 8 d 1=Euclidean_Distance(V 0, V 1) d 8=Euclidean_Distance(V 0, V 8) If (d 1<d 8), then Block X is replaceable Otherwise, Block X is non-replaceable 14

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 0 1 1 0 1 Index Table 0 1 0 0 Secret bits 0 1 1 0 If (d 6<d 13) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 6 Embedding Result 15

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 0 1 1 0 1 Index Table 0 1 0 0 Secret bits 0 1 1 0 If (d 2<d 9) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7, CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 6 9 Embedding Result 16

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 0 1 1 0 1 Index Table 0 1 0 0 Secret bits 0 1 1 0 If (d 12>=d 5) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 CW 15: embed 1 6 9 15||12 Embedding Result 17

A secret message: 1 0 1 0 0 1 1 1 1 0 0

A secret message: 1 0 1 0 0 1 1 1 1 0 0 0 1 1 0 1 Index Table 0 1 0 0 Secret bits 0 1 1 0 If (d 9>=d 2) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 CW 0: embed 0 6 9 15||12 0||9 Embedding Result 18

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table 1 Extract Secret bits

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table 1 Extract Secret bits If (d 6<d 13) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 6 Recovery 19

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table 1 0 Extract Secret

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table 1 0 Extract Secret bits If (d 9>=d 2) CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 6 2 Recovery 20

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table CW 1, CW 2,

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 1 Extract Secret bits 6 2 12 Recovery 21

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table CW 1, CW 2,

Extraction and Recovery 6 9 15||12 0||9 Steganographic Index Table CW 1, CW 2, CW 3, CW 4 CW 5, CW 6 CW 7 , CW 15 1 CW 8, CW 9 CW 10, CW 11 CW 12, CW 13 CW 14 , CW 0 0 1 0 Extract Secret bits 6 2 12 Recovery 9 22

How to find the dissimilar pairs? Codebook CW 1 CW 2 CW 3 CW

How to find the dissimilar pairs? Codebook CW 1 CW 2 CW 3 CW 4 CW 5 CW 6 CW 7 CW 8 CW 9 CW 10 CW 11 CW 12 CW 13 CW 14 23

Codeword Distribution 24

Codeword Distribution 24

Codeword Projection by PCA (Principle Component Analysis) 25

Codeword Projection by PCA (Principle Component Analysis) 25

Find the Dissimilar Pairs 26

Find the Dissimilar Pairs 26

Experiments Codebook size: 512 Codeword size: 16 The number of original image blocks: 128*128=16384

Experiments Codebook size: 512 Codeword size: 16 The number of original image blocks: 128*128=16384 The number of non-replaceable blocks: 139 27

Experiments Codebook size: 512 Codeword size: 16 The number of original image blocks: 128*128=16384

Experiments Codebook size: 512 Codeword size: 16 The number of original image blocks: 128*128=16384 The number of non-replaceable blocks: 458 28

Conclusions n A reversible VQ steganographic mehtod is proposed 29

Conclusions n A reversible VQ steganographic mehtod is proposed 29

Thank you very much for your attention !! 30

Thank you very much for your attention !! 30

Data Hiding system Cover image Stego image 10101Data Hiding system Cover image Stego image 10101
Data Hiding system Cover image Stego image 10101Data Hiding system Cover image Stego image 10101
Data Hiding system Cover image Stego image 10101Data Hiding system Cover image Stego image 10101
Data Hiding system Cover image Stego image 10101Data Hiding system Cover image Stego image 10101
Data Hiding system Cover image Stego image 10101Data Hiding system Cover image Stego image 10101
Information Hiding system Cover image Stego image 10101Information Hiding system Cover image Stego image 10101
Hiding a Secret Image in a Cover ImageHiding a Secret Image in a Cover Image
Cover Crops What Are Cover Crops A coverCover Crops What Are Cover Crops A cover
COVER CROPS Why use cover crops Cover cropsCOVER CROPS Why use cover crops Cover crops
Cover letter Why a cover letter A coverCover letter Why a cover letter A cover
Cover 1 Temperature Fluctuations Cover objective To coverCover 1 Temperature Fluctuations Cover objective To cover
Hiding Your Faith Matthew 5 14 16 HidingHiding Your Faith Matthew 5 14 16 Hiding
Animals in Hiding There is an animal hidingAnimals in Hiding There is an animal hiding
HIDING FROM AND HIDING IN JESUS CHRIST EMBRYHIDING FROM AND HIDING IN JESUS CHRIST EMBRY
ANIMAL MAGAZINE STRIP MASTHEAD COVER IMAGE COVELINE COVERANIMAL MAGAZINE STRIP MASTHEAD COVER IMAGE COVELINE COVER
N2M5 Beautiful Number4 10 1010 10101 Output 4N2M5 Beautiful Number4 10 1010 10101 Output 4
IEEE P 11073 10101 Update HL 7 DEVIEEE P 11073 10101 Update HL 7 DEV
IEEE P 11073 10101 a Update HL 7IEEE P 11073 10101 a Update HL 7
IEEE 11073 10101 R Comment Resolution 11 IEEEIEEE 11073 10101 R Comment Resolution 11 IEEE
A New Algorithm for Hiding Data Using ImageA New Algorithm for Hiding Data Using Image
Adaptive data hiding for vector quantization image basedAdaptive data hiding for vector quantization image based
Hiding Data Reversibly in an Image via IncreasingHiding Data Reversibly in an Image via Increasing
A reversible data hiding in encrypted image basedA reversible data hiding in encrypted image based
A New Reversible Data Hiding in Encrypted ImageA New Reversible Data Hiding in Encrypted Image