Wyniki wyszukiwania - BazTech

1

Confidential Greedy Graph Algorithm

Waszkiewicz D., Horubala A., Sapiecha P., Andrzejczak M.

International Journal of Electronics and Telecommunications

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2018

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Vol. 64, No. 2

179--183

EN

Confidential algorithm for the approximate graph vertex covering problem is presented in this article. It can preserve privacy of data at every stage of the computation, which is very important in context of cloud computing. Security of our solution is based on fully homomorphic encryption scheme. The time complexity and the security aspects of considered algorithm are described.

2

Block Cipher Based Public Key Encryption via Indistinguishability Obfuscation

Horubała A., Waszkiewicz D., Andrzejczak M., Sapiecha P.

International Journal of Electronics and Telecommunications

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2018

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Vol. 64, No. 2

173--178

EN

The article is devoted to generation techniques of the new public key crypto-systems, which are based on application of indistinguishability obfuscation methods to selected private key crypto-systems. The techniques are applied to symmetric key crypto-system and the target system is asymmetric one. As an input for our approach an implementation of symmetric block cipher with a given private-key is considered. Different obfuscation methods are subjected to processing. The target system would be treated as a public-key for newly created public crypto-system. The approach seems to be interesting from theoretical point of view. Moreover, it can be useful for information protection in a cloud-computing model.

3

Data confidentiality and computations hiding in cloud services for public administration

Horubała A., Waszkiewicz D., Andrzejczak M., Sapiecha P.

Computer Science and Mathematical Modelling

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2018

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No. 7

11--18

EN

Cloud services are gaining interest and are very interesting option for public administration. Although, there is a lot of concern about security and privacy of storing personal data in cloud. In this work mathematical tools for securing data and hiding computations are presented. Data privacy is obtained by using homomorphic encryption schemes. Computation hiding is done by algorithm cryptographic obfuscation. Both primitives are presented and their application for public administration is discussed.

PL

Chmura obliczeniowa zyskuje coraz większą popularność i staje się ciekawą alternatywą do wykorzystania w administracji publicznej. Istnieje jednak wiele obaw co do bezpieczeństwa i prywatności przechowywanych w chmurze danych osobowych. W tej pracy zaprezentowano matematyczne narzędzia zabezpieczania danych oraz ukrywania obliczeń. Prywatność danych uzyskuje się poprzez wykorzystanie szyfrowania homomorficznego, natomiast ukrywanie danych poprzez obfuskację kryptograficzną. Oba prymitywy zostały zaprezentowane oraz omówiono ich zastosowanie dla administracji publicznej.