Системи та методики обробки інформації
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Item COMPARISON OF THE THROUGHPUT OF THE CARRIERR SENSE MULTIPLE ACCESS PROTOCOL WITH CONFLICTS RESOLVING ON THE PHYSICAL LEVEL. Порівняння пропускної здатності протоколу множинного доступу контролю несівної з розв'язання конфліктів на фізичному рівні(2019) Yerokhin, V.; Єрохін, В.; Poliakova, A.; Полякова, А.; Sboiev, R.; Сбоєв, Р.At present, the global growth of communication needs makes us more efficient in using of the frequency spectrum. Assuming that at one frequency there is an opportunity to transmit several mutual interference signals at one time, the problem is the separation of these signals. But, complexity of demodulation procedures has significantly increased compared to the classical. Thus, we must determine whether a reasonable increase of complexity and how will increase the throughput of some communication system. In researching we will choose carrier sense multiple access protocol.Item КЛЮЧІ ТА ІДЕНТИФІКАТОРИ В СИСТЕМАХ УПРАВЛІННЯ ДОСТУПОМ. KEY AND IDENTIFIERS IN ACCESS CONTROL SYSTEMS(2019) Білогуров, В.А.; Bilohurov, V.A.; Назарок, Д.С.; Nazarok, D.S.The subject of this article was the main and auxiliary means and devices, which allowed first to differentiate access to information and objects, and subsequently to automate such access. Contact, non-contact and combined smart cards that operate at 125 kHz or 13.56 MHz (in near-field communication systems) are considered. Standards are described in specifications ISO 18902, ISO 7816, ISO 14443 variants A and B (less frequently ISO/IEC 15693), EMV (Europay, MasterCard, Visa), IPS/JEDEC J-STD- 020C, ECMA. Typical use of smart cards (tags) is discussed: – access control and time management at enterprises; – paid access to car parks, lifts, attractions, etc; – payments for the use of public transport; – replacement or addition of bank and discount cards with magnetic stripe; – keyless access to vehicles. There are three main card standards: Mifare, EM Marine and HID. The media standard is defined by the chip. The tag allows data encryption and provides up to 100,000 overwrite cycles. Design and element base of maps are considered. Attention paid to the volume of tags memory and the use of new technologies. Ways of protection against unauthorized interference such as traditional technologies of data encryption AES (Advaced Encryption Standard), SHA (Secure Hash Algorithm), and American FIPS (Federal Informaion Processing Standards) are considered. The article focuses on the use of biometric module AT77SM0101BCBO2VKE manufacturing Atmel in particular for foreign passports. Design and peculiarities of operation of readers, as well as the use of common tags for anti-theft systems of cars are considered. Possessing the basic functionality of systems and components of remote access control can be useful to practitioners in implementing law enforcement practices.