Στεγανογραφία και συμπιεσμένη αίσθηση
Τσακαμής, Γεώργιος Ι.
Steganography is another term for covert communication. The main goal of steganography is to hide messages in inconspicuous objects without anybody find them. Although steganography has many similarities with cryptography and watermarking however, it differs a lot. Steganography in digital media is a new science which is growing rapidly, however lots of open issues occur. This postgraduate thesis is separated in two main parts. In the first part is realized a analytic presentation of term steganography and various categories and types that exist, while in the second part we develop a new method of detection of use steganography in a picture. This method is based on the technique compressive sampling. Aim of this method is to find the number of same pixels between the initial picture and the stego-picture.