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EN
Applications of VANET (Vehicular ad hoc Networks) networks is focused on monitoring of the safety states of vehicles or roadway by exchanging messages between vehicles and infrastructure so that the applications will be able to help a driver to handle insecure situations. They are able to warn before possible risks which can occur during the process of transportation. Essential tool for assuring of safety communications within developed applications of intelligent transportations systems are cryptography constructions on the basis of digital signature schemes. In order to assuring safety and anonymity within vehicular communications are used pseudorandom authentications methods. The authors in the paper are focused on realization of mathematical model and description of modified cryptographic constructions which are suitable for sensor networks and applications orientated to memory and performance. In these systems it is very important to use signature scheme which do not have only computational safety but must also be effective from the view of performance and must generate short digital signatures in order to communications in real time conditions.
EN
Vehicular Ad-Hoc Networks (VANETs) are getting more and more commercial relevance, because it offers a new level of vehicle communication services. One of the main problems of the analyzed communication system is the security assurance of transmitted data because security mechanisms common in wireless LANs are not suitable for VANETs and handoff latency is crucial. In this paper, VANET authentication schemes are analyzed and a new trust based authentication scheme is proposed which significantly can reduce the handoff latency time.
PL
Samochodowe sieci Ad-Hoc (VANETs) mają coraz większe znaczenie komercyjne, ponieważ oferują nowy poziom usług komunikacji pojazdu. Jednym z głównych problemów analizowanego systemu komunikacji jest zapewnienie bezpieczeństwa przesyłanych danych, ponieważ mechanizmy bezpieczeństwa powszechne w bezprzewodowych sieciach LAN nie nadają się do sieci typu VANET, a wartość opóźnienia ma kluczowe znaczenie. W niniejszej pracy przeanalizowano metody uwierzytelniania systemów VANET i zaproponowano nowy system bezpieczeństwa oparty na uwierzytelnianiu, co może znacznie zmniejszyć czasy opóźnień.
3
EN
An Intelligent transportation system (ITS) focuses on application of smart vehicles. The vehicles are equipped with significant computing, communicating and sensing capabilities to provide services to travelers or the goal of providing safety massages in emergency situations. Vehicular network may also be used for Internet access, inter-passengers communications and entertainment. To understand the behavior of such networks as well as to provide good services to the travelers many issues have to be managed, some of them are: call handover between vehicles in vehicular network, speed Vs capacity, security of call, network topology, and network fragmentation. In this paper we study such vehicular networks and explain these issues and the related work. Detailed study of practical node mobility models based on mobility states and the quality of practical links based on received signal strengths are used as inputs for system capacity studies. Experiments were run in Sydney based on drive tests with mobile terminals deployed on them. Then some new ideas for managing the vehicular networks are proposed.
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