TRABALHOS PUBLICADOS
2012 |
A Brief Comparison of Security Aspects of Time Synchronization in Networked Control Systems using CSMA/CD versus TDMA Protocols Proceedings Article Junior, Eloy Martins Oliveira; Oliveira, Marcelo Lopes; Souza, Resumo | Links | BibTeX | Tags: CSMACD, TDMA I INTRODUCTION, Time Synchronization @inproceedings{Eloy2012Timeb,Current systems such as satellites, aircrafts, traffic controls, military systems and smart grids are becoming increasingly complex and/or highly integrated as prescribed by constraints, the SAE-ARP-4754 Standard. The complexity and/or high integration make the security of these systems itself a challenge. Such systems, usually in a form of networked control systems (NCS), require accurate time synchronization among its nodes and devices for correct operation. So, any accidental or intentional fluctuation beyond a tolerance in communication and hence in the control systems. This paper presents a brief comparison of security aspects of time synchronization in NCS using CSMA/CD (Carrier Sense Multiple Access - Collision Detection) and TDMA (Time Division Multiple Access) protocols. This highlights how the NCS using CSMA/CD and TDMA networks is affected by the malicious clock de-synchronization; and this includes some simulations to illustrate them. The paper concludes by the comparison of networks and suggests some countermeasures, based on the comparisons and simulations presented. |