Implementation of GOST 34.12-2018 Encryption for LoRaWAN End-devices

The well-known LoRaWANtandard, due to its properties, is widely used along with other technologies belonging to the class of low-power wide-area networks (LPWAN). LoRaWAN's AES-128 cryptographic protection is well known and is used in many IoT applications. At the same time, there are a number of tasks, the solution of which requires the use of additional crypto protection, in particular - the GOST 34.12-2018 standard when used in critical infrastructure systems. The paper proposes a software module for a device of the LoRaWANstandard, which implements encryption with a 128-bit block length (`Kuznyechik'). Its properties are investigated using the implementation in the IMST GmbH iM880B module. The software module assumes additional encryption, in addition to those existing in the LoRaWANstandard, to ensure information security in accordance with Russian standards. The work shows that the operation of the module leads to a slight increase in the consumption of resources (both computational and energy), which makes the proposed approach promising for industrial implementation and distinguishes it favorably from the method of hardware implementation of additional encryption. The software implementation can be used to implement lightweight encryption in tasks related to preventing operator access to transmitted data and protecting against certain types of attacks.