1 Marcin Sokół, Małgorzata Gajewska, Sławomir Gajewski, Andrzej Marczak Gdansk University of Technology SECURE ACCESS CONTROL AND INFORMATION PROTECTION MECHANISMS IN RADIO SYSTEM FOR MONITORING AND ACQUISITION OF DATA FROM TRAFFIC ENFORCEMENT CAMERAS Abstract: The study presents the architecture of the Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras (in short: RSMAD), particularly concerning access control and protection of confidential data. RSMAD security structure will be discussed in relation to network security issues. Additionally, the paper presents the results of the work associated with the modelling of potential threats to system security. Keywords: AES, RSMAD, VPN 1. INTRODUCTION Radio System for Monitoring and Acquisition of Data (RSMAD) from Traffic Enforcement Cameras (TEC) will be a highly integrated and distributed data communication system dedicated to the automatic acquisition and processing of static image data from traffic enforcement cameras. The key features of the RSMAD system, such as its modularity and scalability of the applied solutions, will provide the system with the flexibility to adapt its functionalities to the changing requirements of a system administrator. The implementation of the RSMAD system will improve the work of public institutions (including the police), the area of using traffic enforcement cameras and issuing fines. The image data concerning traffic offences will be transmitted in the form of encrypted transport blocks to Data Acquisition Center (DAC), which will constitute the central point of the system. Data transmission will be carried out, using public cellular networks and the global Internet network. The structure of the DAC is to be distributed. It will also retain all the features of transparency. The DAC will include: Management Center (MC), Services Delivery Center (SDC) and Data Center (DC). The system will also enable a safe two-way communication with the Central Database of Vehicles and Drivers (CDVaD), in Polish: CEPiK.