湿影像的资讯隐藏技术

湿影像的资讯隐藏技术湿影像的资讯隐藏技术第1页2SecretsSenderReceiverInternetDataEmbedding‧Steganography-prisonproblem‧Reversibledatahiding-Medicalimage-Military

image-QualityandcapacitySecrets湿影像的资讯隐藏技术第2页30123412340234010123401234………255255p2p1012340123402413012340MagicMatrixZhang,X.P.andWang,S.Z.,“EfficientSteganographicEmbeddingbyExploitingModificationDirection,”IEEEcommunicationsletters,vol.10,no.11,pp.1-3,Nov.,.n=2,F(2,3)=3s=1(p1',p2')=(2,2)F(p1,p2)=(1*p1+2*p2)mod(2n+1)湿影像的资讯隐藏技术第3页4DataHidingUsingSudoku(1/8)SpatialdomaindataembeddingSudokuAlogic-basednumberplacementpuzzle湿影像的资讯隐藏技术第4页5DataHidingUsingSudoku(2/8)PropertyPossiblesolutions:6,670,903,752,021,072,936,960(i.e.≈6.671×1021)ASudokugridcontainsnine3×3matrices,eachcontainsdifferentdigitsfrom1to9.EachrowandeachcolumnofaSudokugridalsocontaindifferentdigitsfrom1to9.湿影像的资讯隐藏技术第5页612DatahidingusingSudoku(3/8)

ReviewZhangandWang’smethod(Embedding)879479545511202112241210109Extractingfunction:0123401234567012345678910118910112550123401255…234012340140123401234:0231234012340123401234023401234012340123401234014012340134023123401234012340123401234012340123401234012340123012340123401024130241302………………………………::::::::::::MagicMatrixCoverimage10002

135Secretdata:

10001011…77104Stegoimagep1p2湿影像的资讯隐藏技术第6页70123401234567012345678910118910112550123401255…234012340140123401234:023123401234012340123401234012340123401234012340140123401234023123401234012340123401234012340123401234012340123012340123401024130241302………………………………::::::::::::MagicMatrix77104Stegoimage1

35Extractedsecretdata:10002p1p2DatahidingusingSudoku(4/8)

ReviewZhangandWang’smethod(Extracting)湿影像的资讯隐藏技术第7页8DatahidingusingSudoku(5/8)-1ReferenceMatrixM湿影像的资讯隐藏技术第8页9DatahidingusingSudoku(Embedding)(6/8)87111279545511202112241210109CoverImageSecretdata:

01100110…279d(,)=((8-8)2+(4-7)2)1/2=3d(,)=((9-8)2+(7-7)2)1/2=1d(,)=((6-8)2+(8-7)2)1/2=2.2479StegoImagemin.湿影像的资讯隐藏技术第9页10DatahidingusingSudoku(Embedding)(7/8)87111279545511202112241210109CoverImaged(,)=((11-11)2+(15-12)2)1/2=3d(,)=((15-11)2+(12-12)2)1/2=4d(,)=((9-11)2+(14-12)2)1/2=2.8391479StegoImagemin.279Secretdata:

01100110…湿影像的资讯隐藏技术第10页11DatahidingusingSudoku(Extracting)(8/8)97914StegoImageExtracteddata:279=0110012

湿影像的资讯隐藏技术第11页12MagicMatrixDuc,K.,Chang,C.C.,“Asteganographicschemebyfullyexploitingmodificationdirections,”TechniqueReportofFeng-ChiaUniversity.r=F(pi,pj)=((t-1)×pi+t

×pj)modt2

t

bitsperpixelpair湿影像的资讯隐藏技术第12页13ColorretinalimageSegmentedimage湿影像的资讯隐藏技术第13页14WetPaperCodingKey110010011010011100111011000010011110001000001110101010110010011010011100111011000010011110001000001110101010110010011010011100111011000010011110001000001110101010Fridrich,J.

Goljan,M.,Lisonek,P.andSoukal,D.,

“WritingonWetPaper,”IEEETransactionsonSignalProcessing,vol.53,no.10,pp.3923-3935,

湿影像的资讯隐藏技术第14页15WetPaperCoding(2/2)RandomMatrixLSBofCoverImageSecretData213030CoverImage×=?Theimportantareaismarkedaswetpixel203031Stego-image湿影像的资讯隐藏技术第15页16WetPaperCodingwithXOROperationKeyEightgroups{31},{35,31,32},{34,35,33},{32},{33},{35,35},{33,33,34},{32,32}AtleastonedrypixelSecrets:01010111LSB(35)⊕LSB(31)⊕LSB(32)1{35,31,33}LSB(31)0{30}Stego-pixels30353133343533333235343333353233湿影像的资讯隐藏技术第16页1730353133343533333235343333353233SecretExtractingLSB(30)=0LSB(35)⊕LSB(31)⊕LSB(33)=1LSB(34)⊕LSB(35)⊕LSB(33)=0LSB(33)=

1LSB(32)=0LSB(35)⊕LSB(34)=1LSB(33)⊕LSB(33)⊕LSB(35)=1LSB(32)⊕LSB(33)=1湿影像的资讯隐藏技术第17页18ProposedScheme(1/6)KeyS=3,1,2,3,1,0,0Threetypes:RestrictedPairsofWetPixels(RPW)-Non-restrictedPairsofWetPixels(NRPW)-PairsofDryPixels(DP)Embeddable湿影像的资讯隐藏技术第18页19(p1,p2)=(31,35),n=2ProposedScheme(2/6)S=3(p1',p2')=(33,35)xy湿影像的资讯隐藏技术第19页20ProposedScheme(3/6)S=1(p1',p2')=(31,31)yx(p1,p2)=(31,32),n=2湿影像的资讯隐藏技术第20页21(p1,p2)=(33,32),n=2ProposedScheme(4/6)S=2(p1',p2')=(34,32)湿影像的资讯隐藏技术第21页2233343232333335353435343231313335ProposedScheme(5/6)33343232333335353435343231313335Key33343232333335353435343231313335湿影像的资讯隐藏技术第22页2333343232333335353435343231313335S