Výsledky vyhledávání - "Korzhik, Valery"

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Semi-Fragile Image Authentication based on CFD and 3-Bit Quantization

Autor: Zhuvikin, Aleksey, Korzhik, Valery, Morales-Luna, Guillermo

There is a great adventure of watermarking usage 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, le

Externí odkaz: http://arxiv.org/abs/1608.02291

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Secret Key Agreement Over Multipath Channels Exploiting a Variable-Directional Antenna

Autor: Korzhik, Valery, Yakovlev, Viktor, Morales-Luna, Guillermo, Kovajkin, Yuri

We develop an approach of key distribution protocol (KDP) proposed recently by T. Aono et al. A more general mathematical model based on the use of Variable-Directional Antenna (VDA) under the condition of multipath wave propagation is proposed. Stat

Externí odkaz: http://arxiv.org/abs/1101.3774

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Key Distribution Protocols Based on Extractors Under the Condition of Noisy Channels in the Presence of an Active Adversary

Autor: Yakovlev, Viktor, Korzhik, Valery, Morales-Luna, Guillermo, Bakaev, Mihail

We consider in this paper the information-theoretic secure key distribution problem over main and wire-tap noise channels with a public discussion in presence of an active adversary. In contrast to the solution proposed by ourselves for a similar pro

Externí odkaz: http://arxiv.org/abs/1005.3184

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Wet Paper Coding for Watermarking of Binary Images

Autor: Zubarev, Michail, Korzhik, Valery, Morales-Luna, Guillermo

We propose a new method to embed data in binary images, including scanned text, figures, and signatures. Our method relies on the concept of wet paper codes. The shuffling before embedding is used in order to equalize irregular embedding capacity fro

Externí odkaz: http://arxiv.org/abs/0808.2486

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