The main idea behind trusted computing is the hardware based TPM which contains active security modules that supports web of trust to be built within components of the network. We propose a new model for web of trust within vehicular to handle all types of attacks and maintain the integrity of messages.

1. Forming Vehicular Web of Trust in VANET
V T
E
A N
VANET Security
Research Group (VSRG)
Dr I.A.Sumra

2.  Introduction
 REQUIREMENT OF TRUST IN P2P VEHICULAR NETWORK
 PROPERTIES AND COMPONENTS OF TRUST IN VEHICULAR
NETWORK
 PROPOSED TRUST LEVELS
 TYPES OF TRUST IN VEHICULAR NETWORK
 Conclusion
 References
 Q&A
2

3.  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.
Road Side Unit (RSU)
V2V
V2V
Basic VANET Architecture
3
V2I

4.  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!!!
4

5.  “an entity can be trusted if it always behaves in
the expected manner for intended purpose”.
 all components of the network (vehicles and
infrastructure) are behaving in an
expected manner
 (secure communication between the
components) and serve the users and save
human lives.
Attacker
Change
the
behavior

6.  User Behavior
 Node Behavior
 Road Side Unit (RSU) Behavior
Attacker RSU
Node
User
Attack
User
Node
RSU
Attacker
Attacks
Exchange
Secure
information
A B
H
F
C
G
Warning:!!!
Accident at location Y.
D E
Broadcast Road
Condition Warning !!!!!
RSU
D
C
A B

7.  Security is one of the most important issues in vehicular
network. Applications of vehicular network should be secure
and user receives right information while traversing along
their journey.
 Trust is also a key component of security and trust is governs
the behavior all components in the network which must
behave in the expected manner.
 User, vehicle and road side unit (RSU) are some components
of trusted vehicular network. If any of these components of
network unexpectedly change their behavior then it would
signify that there is a breach of trust in the network.

8.  What is TRUST : “A system or component that behaves in
expected manner for the particular purpose” .
 TRUST in VANET : All components of the network (user,
vehicles and infrastructure) are behaving in an expected
manner (trusted communication between the components)
and serve users which subsequently would save human lives.
NODE
C
NODE
B
RSU
D
NODE
A

9.  Context Dependence
 Function of Uncertainty
 Quantitative Values
 Transitivity
 Asymmetry
 Personalization Vehicular TRUST
Component
Behavior
Expected
Manner
Particular
Purpose
User
Node
RSU
Safety
Application
Serve
User
Non Safety
Application
Components of TRUST in Vehicular Network

10.  In the proposed Vehicular
Web of TRUST (VWT)
environment the each
vehicle possess a Trust
Module with a TPM
hardware module inside
the vehicle.

11. 1. Trust between TPMs and Vehicle Sensors
2. Trusted Medium (DSRC)
3. Trust between Vehicle to Vehicle (V2V)
4. Trust between Vehicle to Infrastructure (V2I)

12. 1. Trust between TPMs and Vehicle Sensors

13. 2. Trusted Medium (DSRC)
 At the second level, the role of the medium is important,
dedicated short range communication (DSRC) frequency band
is used for all types of communication in VANET.
 DSRC provides multiple channels and its transmission ranges
from 5.850 to 5.925 GHz. DSRC are divided into seven
channels and each channel range is 10 MHz.
 Every vehicle in the network receives messages from other
vehicles or from infrastructure. A secure and trusted content
of message is the major concern of the users.

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

15. 4. Trust between Vehicle to Infrastructure (V2I)

16.  DAA is a digital group signature scheme and it was
originated by Brickell, Camenisch and Chen.
 It provides the facility to a third party to validate the
TPM, and check whether the user platform is genuine.
 In VANET environment, DAA can be considered for
attesting a vehicle platform, and at the same time
protecting the privacy of the user. Using of DAA we
can develop the four level of trust in vehicular
communication.

17.  Reducing the death rate, avoiding congestion on
roads and makes comfortable journey some of key
objective of vehicular network.
 Security and trust are becoming increasingly key
challenges issues in vehicular network.
 TPM hardware module is the key module of trusted
computing and that supports to develop trust in
vehicular communication environment.
 In this paper we have presented new model for web
of trust within vehicular network and this model
are based on four level of trust.

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 Please download complete paper from
◦ IEEEE website
◦ ResearchGate

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