پديد آورنده :
عمومي، مسعود
عنوان :
افزايش بازدهي جاسازي روش هاي پنهان نگاري پر ظرفيت با معرفي فضاهاي جديد باينري و غير باينري
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
شانزده،179ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
شادرخ سماوي
استاد مشاور :
محمود مدرس هاشمي
توصيفگر ها :
پنهان شكني , چگالي طيف توان نويز گنجانه , نمودار مشخصه ي عملكرد گيرنده﴿ROC﴾
استاد داور :
كريم فائز، احمدرضا نقش نيلچي، مهدي برنجكوب
دانشكده :
مهندسي برق و كامپيوتر
كد ايرانداك :
ID411 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Improving Embedding Efficiency of High Payload Steganographic Schemes by Introducing New Binary and Non binary Spaces Masood Omoomi omoomi@cc iut ac ir Date of Submission October 2 2011 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 IranSupervisor Shadrokh Samavi samavi96@cc iut ac irAdvisor Mahmoud Modarres Hashemi Department Graduate Program Coordinator Amir Borji Department of Electrical and Computer Engineering Isfahan University of TechnologyAbstract The most important steganographic schemes are usually based on slight modifications incover media Two basic criteria in designing each embedding algorithm which arequantitatively and simultaneously evaluated by the value of embedding efficiency aresecurity and capacity In this dissertation after thorough investigation of the main concepts ofsteganography and steganalysis two novel families of steganographic schemes based oncover modification are proposed The first one so called Bn is a binary group of embeddingmethods which have better embedding efficiencies than the custom LSB replacement andLSB matching algorithms In addition a group of ternary embedding algorithms so calledTn with high value of embedding efficiency is proposed All of the innovativesteganographic schemes in this thesis are included in the kind of embedding methodswhich can be modeled by additive noise information hiding During the process of dataembedding the histogram of cover signal is softened by a low pass filter to generate thehistogram of stego signal The impulse response of this filter is the probability densityfunction PDF of stegonoise signal Using this fact we suggest some methods whoseequivalent filters have less effect on the histogram of cover signals yielding more securityand therefore less detectability against steganalysis attacks KeywordsSteganography Embedding efficiency Steganalysis Power spectrum density of stegonoise Receiver Operating Characteristic ROC
استاد راهنما :
شادرخ سماوي
استاد مشاور :
محمود مدرس هاشمي
استاد داور :
كريم فائز، احمدرضا نقش نيلچي، مهدي برنجكوب
