The article is devoted to the study of the immunity of biometric templates to interference and fading during transmission over the LTE network. The widespread use of remote biometric authentication systems, primarily in remote mobile payment systems, determines the relevance of the chosen topic, and the development of mobile networks, and, first of all, the use of technologies that are more protected from attacks like LTE increases its practical focus. However, when authentication information is transmitted, even over a secure channel, it can be subject to interference and fading. That is why it is important to study their impact on the integrity of the biometric template that will be used to authenticate the user in the system. The paper analyzes the dependence of the quality of the authentication system on the parameters of the mobile communication channel (bit error rate, signal-to-noise ratio) and the parameters of the mobile device that transmits information (MIMO scheme, code rate, modulation scheme), which improves the quality of the remote biometric authentication systems by reasonably choosing the transmission parameters and taking into account the parameters of the communication channel.
In this paper, for the first time, the effectiveness of network steganography methods has been investigated using channel coding of data when they are transmitted over communication channels with interferences, and the method of mathematical modeling evaluates the stability of network steganography methods to the detection. The network steganography methods concealing data in such protocols as HTTP, TCP and ICMP were considered. Using the ICMP «Secure» mode of the developed method, the greatest throughput was achieved. To study the noise resistance of the methods before transmission by the communication channel, the packets were encoded using the 2 Binary 1 Quandary linear coding algorithm, after which additive white Gaussian noise was added to the stego object. The paper substantiates the possibility of using network steganography methods to protect biometric data from unauthorized access in the case of using remote biometric authentication. Based on the research results, it was determined that the network steganography method based on hiding data in TCP is more efficient when working via communication channels with noise. It makes possible to recover a message with small distortions at a dispersion value of 0.4. But according to a set of criteria for resistance to noise and detection probability, the best is the «Fast» mode of the network steganography method based on hiding data in ICMP. Анотація-В роботі вперше досліджено ефективність методів мережної стеганографії за умови використання канального кодування даних при їх передачі каналом зв'язку з шумами та оцінено стійкість методів мережної стеганографії до виявлення. На основі результатів досліджень визначено, що метод мережної стеганографії з використанням протоколу TCP є більш ефективним за умови роботи каналами зв'язку з шумами, але за сукупністю критеріїв стійкість до шумів / прихованість найкращим є режим «Швидкий» методу мережної стеганографії з використанням протоколу ICMP.
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