24-07-2012, 12:31 PM
Security in Vehicular Ad hoc Networks (VANETs)
a Security in Vehicular Ad hoc Networks.ppt (Size: 2.48 MB / Downloads: 85)
Motivation for VANET
Increase safety
Hundreds of thousands of people are killed world-wide due to road accidents yearly.
Many more are injured.
Traffic optimization
Congestion/traffic jams cost time and fuel.
Differences from MANET
Large scale – potentially billion
Fleeting contact with other vehicles
Nodes not as constrained in terms of energy, storage and computation.
VANET applications
Safety alerts
Requirement: Bounded latency
Primary Issue: Broadcast storm
Congestion warning
Requirement: Message persistence
Primary Issue: Disconnected network
Infotainment
Requirement: End-to-end connectivity
Primary Issue: Disconnection due to high mobility
Attackers
Insider or outsider
Insider – valid user
Outsider – Intruder, limited attack options
Malicious or rational
Malicious – No personal benefit, intends to harm other users
Rational – seeks personal benefits, more predictable attack
Active or passive
Active: Generates packets, participates in the network
Passive: Eavesdrop, track users