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Start Over Topic computer science::multimedia Language russian Publisher федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «национальныи исследовательскии томскии государственныи университет»
4 results

1. О слабом классе алгоритмов развертывания ключа относительно метода связанных ключей

Subjects
Computer Science::Multimedia, Computer Science::Cryptography and Security
Abstract

In this paper key-scheduling algorithms having the defined recurrent property are considered. For this class of algorithms we describe related-key attacks. The complexity of the attack is equal to the exhaustive search of one round key. It requires a little number of plaintexts.

Published
2010

2. Оценки сложности дифференциальной атаки при различных параметрах блочного шифра

Subjects
Data_GENERAL, Data_MISCELLANEOUS, Computer Science::Multimedia, Data_CODINGANDINFORMATIONTHEORY, Hardware_ARITHMETICANDLOGICSTRUCTURES, Computer Science::Cryptography and Security
Abstract

In this paper we describe a differential attack on a block cipher in a general case. We calculate the attack complexity for different cipher parameters.

Published
2010

3. Аутентификация в многоуровневой системе на основе коммутативного шифрования

Subjects
Computer Science::Performance, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Data_MISCELLANEOUS, Computer Science::Multimedia, Computer Science::Networking and Internet Architecture, Computer Science::Distributed, Parallel, and Cluster Computing, Computer Science::Cryptography and Security
Abstract

The paper considers the peculiarities of authentication in multi-tier environment and corresponding security problems. The authentication protocol for multi-tier system based on commutative encryption is provided.

Published
2010

4. Анализ стегосистем с нарушением квантования

Subjects
Computer Science::Multimedia, Computer Science::Cryptography and Security
Abstract

In the paper, we provide the analysis of perturbed quantization steganography applied to JPEG images. The ability of determining so-called changeable coefficients is discussed and an approach for that is proposed. This approach allows to create stegosystem that would take advantage of properties of perturbed quantization steganography but would use images in JPEG format as cover images.

Published
2009