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Vehicular Ad Hoc Network (VANET) ppt

Vehicular Ad Hoc Network (VANET) provides wireless communication among vehicles and vehicle to road side equipment's.It provides comfort and commercial applications to the road users. free ppt download
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Published Date:09-03-2017
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VANETIntroduction to VANET -Vehicles connected to each others through an ad hoc formation form a wireless network called “Vehicular Ad Hoc Network”. -Vehicular ad hoc networks (VANETs) are a subgroup of mobile ad hoc networks (MANETs). -It includes V2V communications and V2R communications and is important component of ITS. -Nodes are expected to communicate by means of North American DSRC standard that employs the IEEE 802.11p standard for wireless communication.Continued.. • Vehicular Ad Hoc Network (VANET) provides wireless communication among vehicles and vehicle to road side equipment's. • It provides comfort and commercial applications to the road users. Figure : Working structure of VANETWhy VANET • Increase traveler safety • 10.8 million vehicle crashes from 1990 to 2009 • 36,000 fatalities in 2009 only • 24,000 Deaths due to collision with other vehicles / objects. • Waste Oil around 100 billion per year • Boost on-board luxuryVANETARCHITECTURE V2V V2 R Road Side Unit (RSU) Server (Traffic Server (Location Monitoring) Based Service)Applications of VANET• When data is compromised, the whole system suffers. • The nature of VANETs could lead to malicious attacks. o Predictable movement of nodes. Security in o High mobility of victim/attacker. VANETs • Adversaries could break the system. o Data sinkholes (black hole) o Feed false information. o Sybil attacks. o Flood the system. • Security measures must be taken to avoid malicious attacks on the system.Threats in VANET Threats Threats Threats to to to Availability Authentication driver’s ConfidentialityThreats to AvailabilityBlack Hole Problem Fig. Black Hole Problem Threats to Authentication Because VANET mobility is higher than MANET, routing with capability of ensuring security in VANET is more problematic than Threats Ad-hoc. to  Illegal collection of messages by Confidentiality eavesdropping and gathering of location information available through the transmission of broadcast messages.  Location privacy and anonymity are important issues for vehicle users .• Mobility • Volatility Challenges in • Privacy VS Authentication VANETs • Privacy VS Liability • Network Scalability• Message authentication and integrity. • Message non-repudiation. Security • Node authentication. • Access control. Requirements • Message confidentiality. • Availability • Accountability. • Privacy protection.Authentication  Every message must be authenticated to make sure its origin and to control authorization level of the vehicles  Vehicles sign messages with their private keys along with digital certificate  Digital signature causes an overhead. To reduce this overhead ECC (Elliptic Curve Cryptography) can be used- Vehicular network must be available all the time, in real-time - A delay in seconds for some applications will make Availability the message meaningless and maybe the result will be devastating - Attempting to meet real-time demands makes the system vulnerable to the DoS attack. Accountability/Non-repudiation • Non-repudiation will facilitate the ability to identify the attackers even after the attack happens. This prevents cheaters from denying their crimes. • Accountability is related to the ability to provide necessary evidence to show how each party involves in the communications. • Any information related to the car, e.g. the trip route, speed, time, any violation will be stored in a tamper-proof OBU, any official side holding authorization can retrieve this data.Privacy • Keeping the information of the drivers away from unauthorized observers, this information like real identity, trip path, speed etc. • The privacy could be achieved by using temporary (one-time) keys. Keys are stored in the tamper-proof OBU. The keys will be reloaded in next time that the vehicle makes an official checkup.