Bilkent University
Department of Computer Engineering


Random Delay Assistance for Location Privacy in VANETs


Satiye Albakır Çatal
MSc Student
Computer Engineering Department
Bilkent University

Vehicular adhoc networks(VANETs) are promising technology to provide safer and efficient traffic conditions. This is realized by letting vehicles to exchange safety messages. This messaging increases the awareness of vehicles about their neighbouring vehicles positions and warns drivers about dangerous situations. However, availability of such information facilitates the tracking of vehicles. So, this information must be protected against the potential misuse. In this thesis, we address the problem of achieving location privacy in VANETs with randomly changing identifiers(i.e. pseudonyms) in the presence of a global passive adversary. We suggest to add a random delay to message broadcast period after the vehicle update its pseudonym in mix zones. By this way, we want to mitigate the linkability between two pseudonyms. This could help make tracking more difficult and increase safety and confidence of drivers using VANET. We investigate the effectiveness of proposed scheme based on simulation study.


DATE: 19 November, 2012, Monday @ 16:15