Anotace
The thesis is focused on revealing of hidden information presence in multimedia files, mainly in pictures now. This hidden information (messages) was coded in by means of steganography, which is an additional method of cryptography. Steganography causes a better security for messages and the detection of such a message is not easy. Old fashioned detection methods are based on statistical attack upon discrete cosine transformation (DCT) coefficients.
Žánr a kategorie knihy Artificial Inteligence Applied on Cryptoanalysis Aimed on Revealing Weaknesses of Modern Cryptology and Computer
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