In vehicular ad hoc network, vehicles can share traffic/emergency information. The information should not be modified/manipulated during transmission without detection. We present two novel approaches to provide reliable traffic information propagation: two-directional data verification, and time-based data verification. The traffic message is sent through two (spatially or temporally spaced) channels. A recipient vehicle verifies the message integrity by checking if data received from both channels are matched. Compared with the popular public-key based security systems, the proposed approaches are much simpler and cheaper to implement, especially during the initial transition stage when a mature VANET network infrastructure does not exist.
Furthermore Aslam et al. REF presented two approaches for reliable traffic information propagation: twodirectional data verification and time-based data verification.
Secure Traffic Data Propagation in Vehicular Ad hoc Networks
International Journal of Ad Hoc and Ubiquitous Computing (IJAHUC
Computer Science