پديد آورنده :
مهدوي، مجتبي
عنوان :
پنهان شكني كمي روش جايگزيني بيت كم ارزش مبتني بر تحليل هيستوگرام
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
ده،156ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
شادرخ سماوي
استاد مشاور :
محمود مدرس هاشمي
تاريخ نمايه سازي :
21/6/90
استاد داور :
احمدرضا نقش نيلچي، منصور جم زاده، حسين سعيدي
دانشكده :
مهندسي برق و كامپيوتر
كد ايرانداك :
ID382 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
257 Abstract Digital steganography and steganalysis attracted the attention of many researchersin recent decades Developments in the field of steganography usually mean the increase incapacity and or in security With the same token the aim of researchers in the fieldof steganalysis is to improve the accuracy of detecting the presence of secret data even forvery low embedding rates In recent decades many steganography methods are developedand every now and then new embedding domains are tested for steganographypurposes These domains can be spatial domain or various transform domains suchas discrete cosine transform wavelet transform or any other transforms One of the earliestand simplest methods for steganography is to replace the least significant bit of varioustransform domains with secret data Replacement of LSBs with secret data is not only the earliest and the simplest formof steganography but also the most vulnerable against statistical steganalysismethods The literature is replete with such methods some of them are very accurate andare able to estimate the percentage of capacity that is used for data embedding Thosemethods that are able to estimate the amount of the embedded data are called quantitativesteganalysis methods Generally the quantitative methods are limited to one domain andcannot be used for other domains In this dissertation a quantitative LSB steganalysis method is proposed for variousembedding domains which is comparable with the most accurate quantitative steganalysismethods The proposed method is able to estimate the amount of embedding not only forthe spatial domain but also for many other transform domains such as DCT For thepurpose of steganalysis the proposed method needs only the histogram of the domainwhich the embedding is performed This causes the proposed method to be less complexcompared to its counterpart methods The low complexity of the proposed method makesit suitable for real time steganalysis over internet or digital telephone trunks In this thesis we also proposed an architecture for our method which is suitable for hardwareimplementation
استاد راهنما :
شادرخ سماوي
استاد مشاور :
محمود مدرس هاشمي
استاد داور :
احمدرضا نقش نيلچي، منصور جم زاده، حسين سعيدي
