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A watermark application in the integrity maintenance and verification of associated images is considered. There is a great advantage of watermark use in the context of conventional authentication since it does not require additional storage space for supplementary metadata. However JPEG compression, being a conventional method to compress images, leads to breaking of exact authentication. The usage...
The notion of abstract wire-tap channel concept (WTCC) has been proposed by A. Wyner in 1975 and it was later developed by many researchers. This concept executes special randomized encoding in order to prevent information leaking over the wire-tap channel while maintaining a reliable information transmission over the main channel. The difference between the wire-tap and the main channel is in a different...
We consider the watermarking method based on a holographic transform domain image proposed by A. Bruckstein. Our testing showed that it is resistant not against all possible attacks declared by his inventor, under the condition of a very high image quality just after WM embedding. Only a small part among 120 bits embedding into the image has an acceptable error probability after extraction if some...
The field of modal logic programming has been developed to extend the expressiveness of logic programming. By introducing the modal operators of necessity and possibility within the language of Horn clauses, modal logic programming languages retain its declarative nature without resorting to non-logical features. DL Prolog is a modal logic programming language extending pure Prolog with dynamic logic...
We consider an audio watermarking technique based on echo hiding that provides both a very high quality of audio signals just after embedding of some hidden messages and robustness of their extraction under the condition of natural signal transforms. The technique of cepstrum analysis is used for hidden message extraction along with its parameter optimization. Since the extracted bit error probability...
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