Irina Marakova-Begoc

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—We consider a scenario where an attacker is able to receive a stegosignal only over a Gaussian channel. But in order to provide security of this channel noise–based stegosystem under the very strong condition that an attacker may know even the cover message, it is necessary to establish a very low signal-to-noise ratio in the channel. The last requirement(More)
We use random superimposed codes as sequences for collusion-resistant fingerprints. This approach is more suitable in comparison with the use of some other regular sequences (as WBE-sequences) against watermark removal attacks and traitor tracing is done through the sphere decoding algorithm. The performance evaluation of the proposed method is presented(More)
—In this work we propose the use of random superimposed codes as sequences for collusion-resistant fingerprints. This approach seems to be more suitable in comparison with the use of some other regular sequences (as WBE-sequences) against watermark removal attacks. Sphere decoding algorithm is used for tracing traitors. The performance evaluation of the(More)
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