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)
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)
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)
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