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1、1062ProceedingsoftheIEEE,specialissueonprotectionofmultimediacontent,87(7):1062{1078,July1999.InformationHiding
2、ASurveyFabienA.P.Petitcolas,RossJ.AndersonandMarkusG.KuhnAbstract
3、Informationhidingtechniqueshaverecentlybe-usuallyinterpretedtomeanhidinginformationinotherin-comeimpor
4、tantinanumberofapplicationareas.Digitalformation.Examplesincludesendingamessagetoaspyaudio,video,andpicturesareincreasinglyfurnishedwithdistinguishingbutimperceptiblemarks,whichmaycontainbymarkingcertainlettersinanewspaperusinginvisibleahiddencopyrightnoticeorserialnumberorevenhe
5、lptoink,andaddingsub-perceptibleechoatcertainplacesinpreventunauthorisedcopyingdirectly.Militarycommuni-anaudiorecording.cationssystemsmakeincreasinguseoftracsecuritytech-niqueswhich,ratherthanmerelyconcealingthecontentofUntilrecently,informationhidingtechniquesreceivedamessageu
6、singencryption,seektoconcealitssender,itsmuchlessattentionfromtheresearchcommunityandfromreceiveroritsveryexistence.Similartechniquesareusedindustrythancryptography,butthisischangingrapidlyinsomemobilephonesystemsandschemesproposedfordigitalelections.Criminalstrytousewhatevertra
7、cse-(tableI),andtherstacademicconferenceonthesub-curitypropertiesareprovidedintentionallyorotherwiseinjectwasorganisedin1996[5].Themaindrivingforceistheavailablecommunicationssystems,andpoliceforcestryconcernovercopyright;asaudio,videoandotherworksbe-torestricttheiruse.However,m
8、anyofthetechniquespro-comeavailableindigitalform,theeasewithwhichperfectposedinthisyoungandrapidlyevolvingeldcantracetheirhistorybacktoantiquity;andmanyofthemaresurpris-copiescanbemademayleadtolarge-scaleunauthorisedinglyeasytocircumvent.Inthisarticle,wetrytogiveancopying,andthi
9、sisofgreatconcerntothemusic,lm,overviewoftheeld;ofwhatweknow,whatworks,whatbook,andsoftwarepublishingindustries.Therehasbeendoesnot,andwhataretheinterestingtopicsforresearch.signicantrecentresearchintodigital`watermarks'(hid-Keywords
10、Informationhiding,steganography,copyrightma
11、rking.dencopyrightmessages)and`ngerprin