Analyzing dissemination redundancy to achieve data consistency in VANETs

Abstract

It is generally agreed that VANET security needs to rely on entity-centric trust, as well as data-centric methods. Entitycentric trust typically involves signatures and certificates, while data-centric methods leverage on consistency checks. One way to implement data consistency checking is to exploit redundant information dissemination to detect inconsistencies. In this paper, we propose a metric to investigate the degree of redundancy that different types of information dissemination protocols exhibit. We evaluate our metric using simulations of Geocast and aggregation protocols. Results show that geocast largely eliminates redundancy, whereas aggregation keeps more redundant communication paths.

Graph-Based Metrics for Insider Attack Detection in VANET Multihop Data Dissemination Protocols

“…Our goal is to analyze whether redundancy can be exploited to achieve data consistency in multihop dissemination protocols. In previous work [11], we have presented first metrics for data consistency and performed initial simulations. In this paper, we present extensions of the metrics and perform extensive simulations to show that sufficient data redundancy for consistency checking can be achieved at the cost of higher bandwidth usage and smaller information dissemination areas or reduced information utility.…”