Road accident and traffic congestion are global issues faced by many countries around the world. Road accident led to fatalities and injuries, while traffic congestion led to inconvenient driving and fuel energy wastage. Vehicular Ad hoc Network (VANET), as part of Intelligent Transportation System (ITS), has the ability to provide safety and non-safety applications to users on roads for safe, reliable and comfort driving. In this paper, propose an integrated multi-level Security model and core purpose of this model is to provide the resiliency against malicious attack and aim to reduce incidents of road accidents, as well as to ease traffic congestion.

1. Dr I.A.Sumra

2.  Vehicular ad-hoc network is a special kind of network in which
nodes (Vehicles) can communicate with each other on the road
and with its Infrastructure.
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V2I
Introduction

3.  Safety Applications
 Non Safety Applications
Work
in Progress
Plz! use Alt.
route
Work Zone
Warning:!!!
Work Zone
Warning:!!!
Shopping MALL
( TESCO )
Parking Slot
Available!!!
RSU Parking Slot
Available!!!
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4.  Vehicular network applications require security and the objective of these applications is to
serve users and make their journey secure and comfortable.
 Attackers have their own role in this network and we cannot predict the dynamic behavior of the
attacker. If an attacker works on a safety application and changes the content of the safety
message then it poses a very difficult condition on the road and many users will be affected due
to this kind of attack.
 Accidents are often the result of an alteration of any safety message or the sending of even one
wrong safety message in a network and many human lives are at risk [1].

5.  Network Behavior

6.  Attacker Behavior

9. • Monitoring Attack
• Traffic Analysis Attack
• Man in the Middle (MiMA) Attack

10. Message Alteration Attack
Message Fabrication Attack
Incorrect Data Injecting Attack

12.  DENIAL OF SERVICE (DOS)
 In VANET, DOS shall not be allowed to happen, where
seamless life critical information must reach its
intended destination securely and timely. In summary,
there are three ways the attackers may achieve DOS
attacks.
 There are three levels of DOS attacks as described
below.
1. Basic Level: Overwhelm the Node Resources
2. Extended Level: Jamming the Channel

13.  Basic Level: Overwhelm the Node Resources

14.  Extended Level: Jamming the Channel

19.  1. Trust Inside TPM
 2. Trust between TPM and embedded Smart
Vehicle Sensors
 3. Trust between Vehicle to Vehicle (V2V)
 4. Trust between Vehicle to RSU (V2R)

20.  Trust Inside TPM

21.  2. Trust between TPM and embedded Smart
Vehicle Sensors

22.  3. Trust between Vehicle to Vehicle (V2V)

28.  Security is the top level module that is always demanded for
safe and reliable VANET communications. However, the
dynamic nature of the vehicular network makes it difficult to
identify the attackers, attack types and behavior of the
attackers.
 The aim of an attacker is to launch attacks in the network and
create problems for other users to achieve their particular
goals. Whenever a normal user changes his/her behavior to
become an attacker and launches an attack, this attack would
create problems for other components of the network and
users who utilize that particular component(s).
 Each attack has its own effect level and it is very hard to
identify that particular attack in a particular region of
network.

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30.  Please download complete research paper from
research gate.
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