Cybersecurity: Education, Science, Technique

17-25

Authors: Volodymyr Saiko, Volodymyr Nakonechnyi, Serhii Tolyupa, Serhii Dakov

One of the perspective use of THz (submillimeter) technologies is the wireless communication systems. In particular, it will lead to development of the submillimeter/THz band devices with brand new size, interference immunity and energy efficiency, for high speed video signal broadcasting, line of sight relay, for 5G cell phone transport networks, high precision radars for small size, high velocity target detection and tracking, and hidden object detection radiometric systems. Nowadays, the research of such wireless systems is focused on increase of communication channel bandwidth using superbroadband signals, which occupy all the THz band. However, it’s worth to mention, that in many perspective applications of 5th generation networks, the range has more important role, than the data transmission speed. The goal of the article is the increase of communication center’s information efficiency by the development of innovative solution for construction of the wireless broadband subscriber channel for information resource access using THz band, which provides greater efficiency in the channel’s range and bit rate. The results of THz-band wireless broadband access technical solution analysis are being provided here. The implementation of broadband access requires designating significant informational resource amount per subscriber, which, if the designated resource amount is not enough, leads to decrease in efficiency in service providing. Today’s lack of transmitter/receiver hardware of decent cost, when using unlicensed THz frequencies in backhaul network channels, leads to significant decrease of backhaul network channel length, which means decrease of the network zone size. Therefore, to avoid these flaws, the new technical solution for every subscriber’s bit rate increase, the subscriber amount increase on the territory covered by the access point, and the service coverage territory expansion possibility, is being provided here. During the THz-band channel broadcast system deployment process, one of the main issue is the channel and time resource distribution between the wireless communication system’s different sectors (directions), which is due to the change of traffic quality and amount. A generalized channel and time resource amount prediction algorithm is being provided for high efficiency wireless access channel. The control of such system can be done similarly to the server network. Territorial access point location allows: the increase of data amount being provided to the covered territory subscribers; the possibility to hold energy resource (energy per bit), which means the backhaul channel length is being preserved; the possibility of covered territory size expansion. Generally, the developed solution allows to increase the new generation wireless system data use efficiency, to increase the distance to remote subscriber network in some times, depending on the network access node’s input data stream ratio, and to increase the amount of wireless access points.

35-48

Authors: Svitlana O. Spasiteleva, Volodymyr L. Buriachok

The article is devoted to the definition of problems using of blockchain technologies, and ways to overcome them to create distributed, secure applications. The paper considers the theoretical fundamentals of blockchain technologies and blockchain applications, new models of blockchain business, blockchain applications development platform, blockchain applications security, blockchain applications development problems, prospects for further research. The analysis of recent research and publications in the field of blockchain technologies are made in the article. Based on this analysis, it was determined that the blockchain industry has not yet completed the process of generating a generally accepted multilevel technology description. The overview of existing models of business blockchain, their characteristics and areas of application are done in the article. Software tools for creating and maintaining blockchain applications are considered. The article deals with the features, advantages and problems of using blockchain technology for creating distributed, secure applications. The problem of integration of new and existing private systems with an open blockchains is considered. A possible solution to this problem is the creation of a blockchain authentication service to implement a global security level. Such a service can become a standard security infrastructure for new models of mixed private and public systems that will be useful to all participants in different areas of the economy. The directions of development of protected blockchain applications in the sphere of public administration and private business in Ukraine are determined. In addition, the priority tasks that need to be solved for successful implementation of technology in Ukraine are determined based on the analysis of the current state of development of blockchains. There are three main areas of development of blockade technology: standardization, application security and integration of block systems with existing private systems and modern technologies of artificial intelligence, large data and the Internet of things, and described prospects for further research for them.

55-62

Authors: Oleksii Mykhatskyi

An analysis of navigation and command-telemetric radio channels is used for exploitation of unmanned aviation systems are proceeds. The classification of radio channels vulnerability is tied to the modes of unmanned aerial vehicles control and their safe exploitation key terms. The criteria of flight mission feasibility and applicability of the different control modes are set in the conditions of violation at the radio channels data communication. The signs of successful flight task processing are the aircraft returning and landing to the set point, absence of distortions or rejections of preset flight trajectory, regular payload functioning. Each of these criteria can be broken when hindrances and interferences in the radio channels are present. Composition and setting functions of unmanned aerial vehicles control radio channels depend on the control mode. In-process distinguished manual control mode from earth in the zone of visual control, manual control mode via the feedback video channel, automatic control mode by an aircraft by on-board autopilot with constantly operating bilateral radio channel of telemetry and automatic control mode by the commands without permanent telemetric control. The first two modes envisage the permanent participating of the controlled from ground pilot in the control loop and due to it does not depend on suppression of satellite navigation radio channel. Suppression of radio management channels for these modes usually ends with abnormal finishing the flight. Hindrances and suppression of radio channels at automatic control modes can result in deviation of trajectory from the preset one or unsatisfactory work of the payload. Conclusions contain newest further suggestion on the unmanned aerial systems radio channels security. In the modes of visual hand control the probability of extraneous interference can be diminished by directed antennas. To increase the security at the automatic flight modes it offers to use the satellite navigation data authenticity analyzer with permanent comparison between the satellite data and calculated navigation data.

73-85

Authors: Vadym O. Abramov, Oksana S. Lytvyn

The overview of computer technologies of the Internet of things (IoT) and the brief analysis of a composition and structure of IoT were carried out. Properties of embedded control systems, as the main component of IoT, and features of their development were considered. The IoT-industry inquiries into graduates of higher education institutions analyzed, namely, the level of understanding of the structure and processes in an ecosystem were operate manufacturers of component, suppliers of completed solutions and companies-integrators, as well as possessing a systematic, holistic approach to analysis and evaluation of a business environment and solution of problems, openness to new knowledge, ideas and technologies, ability to organize their own activities and to carry out team projects, effectively communicate with a customer, formulate a technical task, develop a time-lines, assess and ensure the quality of product, represent a product and justify the proposed solution. With this in mind, the key issues and problems of teaching of some IoT relevant disciplines and ways to solve them have been studied. It is shown that highly effective is the educational project training. The special algorithm for creation of built-in IT tools for the IoT to use by students in the process of studying the relevant disciplines and the creation of their own projects has been developed. The algorithm involves the study of most of the widely spread technologies, the conditions of their application and covers all stages of developments used in a real production. The implementation of this research results at Borys Grinchenko Kyiv University for the training of specialists in the specialty "Computer Science" within the framework of disciplines "Physical processes in computing systems" and "Technologies of embedded computer system designing" is described.

94-104

Authors: Anatoliy V. Bessalov

The method of search of cryptographic strong elliptic curves in the Edwards form (where parameter d is non square in the field) over the extended finite fields of small characteristics p ≠ 2.3 is proposed. For these curves is performed the completeness of the points addition law, so they are called as complete Edwards curve. In the first stage over a small prime fields and we find the parameters d of complete Edwards curves who have minimum orders . For both curves we obtain the same values d = 3, which are non square in the fields and . Next with help recurrent formulae for both curves we calculated the orders (where n is odd) of these curves over the extended fields with prime degrees of extension m within known cryptographic standards (with the same bit-length field module 200 ... 600 bits). The calculated values n are tested on primelity. The extensions m, which provide a psevdoprime order 4n of curve with a prime value n, are selected. This provides the highest cryptographic stability of curve by the discrete logarithm problem solution. As a result, over the fields of the characteristic p = 5 we obtain two curves with degrees of expansion m = 181 and m = 277, and over the fields of the characteristic p = 7 one curve with the degree m = 127. For them, the corresponding large prime values of n are determined. The next stage is the calculation of other system-parameters of cryptographic systems based on complete Edwards curves. over the fields of characteristics 5 and 7. The arithmetic of extended fields is based on irreducible primitive polynomials P (z) of degree m. The search and construction of polynomial tables P (z) (for 10 different polynomials for each value m, respectively, for the values of the characteristics p = 5 and p = 7) has been performed. On the basis of each polynomial according to the developed method, the coordinates of the random point P of the curve are calculated. The possible order of this point is the value of 4n, 2n or n. The double doubling of this point is the coordinates and for 30 different generators G = 4P cryptosystems that have a prime order n. The set of parameters that satisfy the standard cryptographic requirements and can be recommended in projecting cryptosystems is obtained.