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Unformatted text preview: September 20, 2008 0:0 World Scientific Review Volume - 9in x 6in ReliableTrafficPopagation-bookchapter-final Chapter 1 Reliable Traffic Information Propagation in Vehicular Ad hoc Networks Soyoung Park, Cliff Zou, and Damla Turgut School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, Florida 32816 A vehicular ad hoc network (VANET) allows vehicles share traffic information and alerting each other any emergency events. To achieve this goal, a security mechanism must be designed to guarantee that no malicious vehicles can intercept, manipulate, or modify the traffic infor- mation without being detected. In this chapter, we present two novel ap- proaches to provide reliable traffic information propagation in a VANET: two-directional data verification , and time-based data verification . The two-directional data verification approach uses vehicles in both driving directions of a two-way road as two separated media channels. A traffic message will be transmitted through both channels. A recipient vehicle verifies the message integrity by checking if data received from both channels are matched. This approach exploits the fact that it is difficult and costly to have two collaborative vehicles on both driving directions in the same region. The time-based data verification approach only uses vehicles in the opposite driving direction to propagate a traffic message by first issuing its public key commitment and later sending the actual traffic message. It relies on the time delay between these two messages and the mobility of vehicles to protect data integrity. 1.1. Introduction With the significant development of network technologies, vehicular ad hoc network (VANET) has been emerging as a feasible and important applica- tion in a ubiquitous environment. In a VANET environment, each vehicle senses and creates its own traffic information and then shares with other vehicles to know the real-time traffic condition in both the local area and its interested areas. Some existing traffic broadcasting systems, such as traffic radio and road-side electronic bulletin boards, can provide traffic informa- tion periodically for some specific locations and directions. Compared to 1 September 20, 2008 0:0 World Scientific Review Volume - 9in x 6in ReliableTrafficPopagation-bookchapter-final 2 these systems, a VANET system could provide much detailed, real-time, and individualized traffic service and also unlimited data services to vehi- cles. To achieve a sustainable collaboration and data sharing among vehicles in a VANET, security mechanisms for trustable traffic message communi- cation should be designed in the first place. The existing security research work in VANET may include self-organizing traffic information system (SO- TIS), 1 security and privacy issues, 27 fast authentication, 8,9 secure data ag- gregation, 10,11 and detecting and correcting malicious data, 11,12 and so on....
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This note was uploaded on 08/25/2011 for the course EEL 5937 taught by Professor Staff during the Spring '08 term at University of Central Florida.
- Spring '08
- Electrical Engineering