In real-life IoT applications, data protection is a significant challenge, especially in military contexts where data can be hijacked or monitored. This paper focuses on implementing end-to-end security to safeguard data. System includes ArduinoUNO board with a GPS sensor, gathering coordinates of the monitored object, transfering them directly to a client Raspberry PI computer, which is in charge of encrypting the acquired data with a lightweight encryption algorithm, thus preparing it for transport through an unprotected network to the server. Server application receives data from the network, deciphers it and displays it on the map. The main idea is to provide the commander with a complete overview of the area of operation. The server application was developed using Qt Framework, while the client application was developed as a standard C++ console application. Another part of this research was also an Qt compatible C++ implementation of the elliptic curve algorithm suite in a separate library which was used both client and server-side. The system was tested and the coordinates data was successfully displayed on the server side. This system was correctly responding and deciphering data in real time causing negligible delay which does not impact practical usability of the system.