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Cryptographic Protection of the Information and Algorithms of Enciphering
Sattarova Feruza Y.,Tadjibayev Furkhat A.,Seung-Hwan Jeon 보안공학연구지원센터 2009 International Journal of Hybrid Information Techno Vol.2 No.4
In order to organize informational security the juridical documents, technical means and cryptographically algorithms, systematic, apparatus-systematic or apparatus-technical means are widely used. And with the advent of high-speed digital lines of information transfer requirements for cryptographic means of enciphering is growing more and more. In cryptosystem based on stream ciphers the entering information is not late in cryptosystem and it allows developing high-speed cryptographic hardware. Besides generated pseudo-casual and truly casual sequences it is widely used in cryptosystems for generation of initial values of confidential parameters and the secret key in the electronic digital signature. The idea of working out of algorithm EDC was developed using operations of algebra parameters. Mathematical model of the digital signature, including parts of formation and the signature check, satisfying to conditions of demanded firmness in a composition of algorithm of enciphering and existing complexities of calculations are developed. In this article also methods of estimation crypto stability of stream cipher algorithm of enciphering and practical results of an estimation of the new developed algorithm are resulted. Also the criteria of protection documentary, vocal and information video in information-communication systems and using cryptographic means are given in this article.
Network Productivity and Quality Indicators of Broadband Connection Channels: a Review
Sattarova Feruza Y.,Tadjibayev Furkhat A.,Debnath Bhattacharyya 보안공학연구지원센터 2009 International Journal of Hybrid Information Techno Vol.2 No.4
This article dedicated to a review of modern methods of researching and estimation of productivity of IEE 802.11 protocol, based on Markov models and allows effectively estimate main indices of productivity of network functioning. The researches of estimation of network functioning is taking on special significance because of adaptation of IEEE 802.11 standard for network construction on a city and regional scale, that solved the problem of providing data in distant regions. A mathematical model of information transmission processes using radio link discreet channels. This model represents the quality indicators of broadband communication channels. The model helps to generate main quality indicators of super broadband communication channel and to calculate the coverage of broadband access networks in field applications. In article on the basis of the theory of reliable communication and mathematical modeling the comparative analysis of efficiency of communication channels in conditions of the limited by power and by a pass band without and with use of system of channel encoding is made. All calculations and results in detail analyze on the basis of model of a plane “band-efficiency"