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Your search keyword '"DATA encryption"' showing total 3 results
Start Over Descriptor "DATA encryption" Topic computer communication networks Language undetermined
3 results on '"DATA encryption"'

1. A New Class of Codes for Fingerprinting Schemes

Author

Josep Cotrina, Miguel Soriano, Marcel Fernandez, Universitat Politècnica de Catalunya. Departament d'Enginyeria Telemàtica, Universitat Politècnica de Catalunya. SERTEL - Serveis Telemàtics, and Universitat Politècnica de Catalunya. WNG - Grup de xarxes sense fils

Subjects
Block code, Theoretical computer science, Computer science, Operating Systems, Data_MISCELLANEOUS, Information Storage and Retrieval, Seguretat informàtica, Trellis (graph), Viterbi algorithm, Computer Communication Networks, symbols.namesake, Computer security, Computer Science::Multimedia, Code (cryptography), Computer Science::Databases, Computer Science::Cryptography and Security, Criptografia, Enginyeria de la telecomunicació [Àrees temàtiques de la UPC], Computers and Society, Linear code, Cryptography, Management of Computing and Information Systems, symbols, Informàtica::Seguretat informàtica::Criptografia [Àrees temàtiques de la UPC], Algorithm, Data Encryption
Abstract

In this paper we discuss the problem of collusion secure fingerprinting. In the first part of our contribution we prove the existence of equidistant codes that can be used as fingerprinting codes. Then we show that by giving algebraic structure to the equidistant code, the tracing process can be accomplished by passing a modified version of the Viterbi algorithm through the trellis representing the code.

Published
2005

2. Blind Statistical Steganalysis of Additive Steganography Using Wavelet Higher Order Statistics

Author

Jessica Fridrich, Sviatoslav Voloshynovskiy, and Taras Holotyak

Subjects
Steganalysis, Steganography tools, Steganography, Cover (telecommunications), Computer science, 020206 networking & telecommunications, Higher-order statistics, 02 engineering and technology, Watermarking, Computers and Society, Computer Communication Networks, Wavelet, Multimedia Information Systems, Management of Computing and Information Systems, 0202 electrical engineering, electronic engineering, information engineering, Key (cryptography), Information Systems Applications (incl. Internet), Embedding, 020201 artificial intelligence & image processing, Algorithm, Data Encryption
Abstract

Development of digital communications systems significantly extended possibility to perform covert communications (steganography). This recalls an emerging demand in highly efficient counter-measures, i.e. steganalysis methods. Modern steganography is presented by a broad spectrum of various data-hiding techniques. Therefore development of corresponding steganalysis methods is rather a complex problem and challenging task. Moreover, in many practical steganalysis tasks second Kerckhoff's principle is not applicable because of absence of information about the used steganography method. This motivates to use blind steganalysis, which can be applied to the certain techniques where one can specify at least statistics of the hidden data. This paper focuses on the class of supervised steganalysis techniques developed for the additive steganography, which can be described as y = f(x, s, K) = x + g(s, K), where stego image y is obtained from the cover image x by adding a low-amplitude cover image independent ((1 embedding also known as LSB matching) or cover image dependent (LSB embedding) stego signals that may be also depended on secret stego key K and the secret data s. The function g(.) represents the embedding rule.

Published
2005

3. On Reversibility of Random Binning Techniques: Multimedia Perspectives

Author

José Emilio Vila-Forcén, Emre Topak, Pedro Comesaña Alfaro, Sviatoslav Voloshynovskiy, Oleksiy Koval, and Thierry Pun

Subjects
Computer Communication Networks, Signal processing, Multimedia, Computer science, Multimedia Information Systems, Management of Computing and Information Systems, Key (cryptography), Information Systems Applications (incl. Internet), Data mining, computer.software_genre, Computers and Society, computer, Data Encryption
Abstract

In this paper, we analyze a possibility of reversibility of data-hiding techniques based on random binning from multimedia perspectives. We demonstrate the capabilities of unauthorized users to perform hidden data removal using solely a signal processing approach based on optimal estimation as well as consider reversibility on the side of authorized users who have the knowledge of key used for the message hiding.

Published
2005

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