22-32

UDC 621.373
DOI: 10.15350/2306-2819.2018.1.22

MESSAGE ENCODING SYSTEM BASED ON A GENERATOR WITH DYNAMIC FEEDBACK

D. A. Vedenkin, A. E. Epov
Kazan National Research Technical University named after A. N. Tupolev-KAI,
K. Marx Street, 10, Kazan, 420111, Russian Federation
E-mail: a.e.epov@gmail.com

ABSTRACT

Introduction. Modern telecommunication systems have limited computing resources. In order to provide secure data transmission with an increasing number of devices, the development of new encryption methods is required that are applicable when the resource capacity of wearable devices is limited. In addition, the current development of cryptographic systems and the construction of secure multiuser communication channels are based on public key encryption systems. The aim of the work is to perform tests in the experimental model using the method of converting a binary sequence based on a generator with dynamic feedback and to compare it with the results of other cryptographic systems. The method described in this paper is based on the formation of a pseudo-random sequence using a linear feedback shift register (LFSR), where the feedback dynamically changes during the operation of the system. It is assumed that this method will be used for cryptographic transformations; therefore the statistical analysis of the generator's operation, obtained by means of the spectral analysis of the signal, is given. In this paper, a test model of a communication channel is presented, in which a message, transformed using a generator with dynamic feedback is transmitted. The description of the destination area of the device being designed, comparison with a generator performing similar functions, which is also implemented in this test model and the results of work are given. Results. The work of the system of cryptographic transformation of information transmitted in the test communication line is considered. To generate public keys, PSP generators with cryptographic stability are used. The system integrates the modern implementation of the PSP generator and graphically evaluates the operation of the generator in comparison with a random sequence. Then the work of the proposed method is described and demonstrated, and the results of the work are compared. The initial analysis shows that the proposed method requires the additional analysis. To form an acceptable memory pass band, the entropy control unit needs to be improved. We can conclude that based on the obtained results of modeling, the proposed method can be used in the encryption block, but it requires the use of a qualitative system development function that will dynamically change the feedback.

KEYWORDS

cryptosystem; binary data set; dynamic system; feedback function; graphical analysis; pseudo-random number generator

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ACKNOWLEDGMENT

The work was carried out with financial support from the Ministry of Education and Science of the Russian Federation within a basic part of the Government Task 8.6872.2017/8.9.

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For citation: Vedenkin D. A., Epov A. E. Message Encoding System Based on a Generator with Dynamic Feedback. Vestnik of Volga State University of Technology. Ser.: Radio Engineering and Infocommunication Systems. 2018. No 1 (37). Pp. 22-32. DOI: 10.15350/2306-2819.2018.1.22