| Abstract [eng] |
During the development of vehicles and their systems, engineers integrate computers and other intelligent modules aimed at monitoring and controlling the performance of the vehicle or the condition of the transported cargo. These modules and systems become attractive objects for various criminals who can cause damage to the vehicle, the driver, passengers and outsiders or their property. Therefore, vehicle safety and security is an extremely important aspect of society and today‘s public infrastruture. The aim of this work is to design a secure communication method that would be applied in vehicles and to comapre the designed method with solutions available on the market. The paper analyzes security problems arising for vehicles, used communication technologies and data protection methods. For the use and research of the secure communication method, it was decided to implement vehicle network prototype which uses the designed comunication security method. Multiple „ESP32“ microcontrollers are communicating in this network using „Bluetooth Low Energy“ communication technology. In order to investigate the effectiveness and usability of the designed method, the research methodology and research parameters where specified in this paper. In the prototype of the proposed solution, there is one device responsible for generating and distributing cryptographic session keys. Also, this device sends data requests to other network nodes. The cryptographic session key is 128 bits in length and is changed periodically. The cryptographic session key is calculated using HKDF function and the data is encrypted using „AES-CBC“ algorithm. Each message on the network has the message authentication code (MAC) which is calculated using HMAC function. Each device communicating in the network checks the message authentication code before performing any operations with encrypted data. After completing research and comparing the secure communication of vehicular local area wireless network method with TLS and DTLS methods, it was observed that the proposed solution is more efficient in terms of energy consumption, memory resource consumption and speed in terms of time. However, weaker network cryptographic protection is used to achieve these results. The results obtained during the experiments and the research are analyzed and the conclusions of the proposed secure communication method are presented. |
