2518-1092Research result. Information technologies2518-109210.18413/2518-1092-2021-6-2-0-22462INFORMATION SYSTEM AND TECHNOLOGIES<strong>RESEARCH OF SPEECH ENCRYPTION RELIABILITY IN GSM MOBILE COMMUNICATION TECHNOLOGY</strong><strong>RESEARCH OF SPEECH ENCRYPTION RELIABILITY IN GSM MOBILE COMMUNICATION TECHNOLOGY</strong>BukhantsovAndrey DmitrievichBukhantsovAndrey Dmitrievichbukhantsov@bsu.edu.ruSajiidAlexander YuryevichSajiidAlexander Yuryevich1275117@bsu.edu.ruUstinovAlexey NikolaevichUstinovAlexey Nikolaevich1319385@bsu.edu.ruRodionovSergey ViktorovichRodionovSergey Viktorovichrodionov.serhii@kart.edu.ua20216200

The article analyzes the strength of the A5/1 stream cipher algorithm in the GSM cellular communication system based on the developed program for modeling the PSP process with a combined circuit of linear registers and the FIPS 140-1 / FIPS 140-2 statistical test implemented in the MatLab software environment. The results of the analysis make it possible to establish that the sequence formed on the basis of the combined scheme from the LRR A5 / 1 is not pseudo-random, which can make it possible to develop recommendations for further improving the protection mechanism in this mobile communication system.

The article analyzes the strength of the A5/1 stream cipher algorithm in the GSM cellular communication system based on the developed program for modeling the PSP process with a combined circuit of linear registers and the FIPS 140-1 / FIPS 140-2 statistical test implemented in the MatLab software environment. The results of the analysis make it possible to establish that the sequence formed on the basis of the combined scheme from the LRR A5 / 1 is not pseudo-random, which can make it possible to develop recommendations for further improving the protection mechanism in this mobile communication system.

encryptionalgorithm A5/1network GSM authenticationencryptionalgorithm A5/1network GSM authentication