Emap expedite message authentication protocol for vehicular ad hoc networks slides

1. EMAP: Expedite Message Authentication Protocol
for Vehicular Ad Hoc Networks
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

2. Introduction:
A taxonomy of wireless networks
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

3. Ad Hoc Networks
• Non-infrastructure
• Fixed and Mobile Nodes
• Special Classes of Ad Hoc Networks
 Vehicular Ad Hoc Networks
 Wireless Mesh Networks
 Wireless Sensor Networks
 Bluetooth Scatternets…
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

4. What is a VANET
(Vehicular Ad hoc NETwork)?
Roadside
base station
Emergency
event
Inter-vehicle
communications
Vehicle-to-roadside
communications
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

5. HMAC
 HMAC stands for Hash-based Message Authentication
Code
 It used to verify data integrity and authenticity of a
message
 It uses current cryptographic hash functions with a
secret key (SHA )

6. Terms
 Some terms to help out with the next slide:
 H = hash function
 K = key
 M = message
 || = concatenation
 XOR = XOR
 o_key_pad = outer padding (one block long 0x36)
 i_key_pad = inner padding (one block long 0x5c)
 In short:
HMAC(k,m) = H((k XOR o_key_pad) || H((k XOR
i_key_pad) || m))

7. A visual look

8. Objective:
 The main aim of this project is to propose
EMAP(Expedite Message Authentication Protocol)
for vehicular Ad hoc Networks which replaces the
time-consuming CRL(Certificate Revocation List)
checking process by an efficient revocation checking
process.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

9. Existing System:
 In existing system, VANETs use the Public Key
Infrastructure (PKI) and Certificate Revocation Lists
(CRLs) in which the authentication of a received
message is performed by checking if the Certificate of
the sender is included in the current CRL.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

10. Demerits:
 A variety of attacks such as
 Injecting false information,
 Modifying and
 Replaying the disseminated messages can be easily
launched.
 Delay in checking the revocation status of a
certificate.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

11. Proposed System:
 Expedite Message Authentication Protocol (EMAP)
for VANETs, replaces the time-consuming CRL
checking process by an efficient revocation checking
process which uses a keyed Hash Message
Authentication Code (HMAC) and novel probabilistic
key distribution.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

12. Merits:
 Decreased message loss ratio
 EMAP is secure and efficient.
 The number of messages that can be verified using
EMAP within 300msec is greater than that using
linear and binary CRL checking by 88.7 and 48.38
percent respectively
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

13. Modules:
 Vehicle-to-Vehicle (V2V) and Vehicle-toInfrastructure
 Expedite Message Authentication Protocol
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

14. 1. Vehicle-to-Vehicle (V2V) and Vehicle-toInfrastructure
 OBU’s can communicate either with other OBU’s
through V2V communications or with RSU’s through
V2I communications.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

15. 2. Expedite Message Authentication Protocol
In this Module,
 A Trusted Authority (TA): provides anonymous
certificate and Distributing secret keys to all OBUs in
the network.
 Roadside units (RSUs): RSUs are fixed units
distributed all over the network.
 On-Board Units (OBUs): OBUs are embedded in
vehicles.
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

16. System Requirements:
 Hardware Requirements:
System
Hard Disk
Floppy Drive
Monitor
Mouse
Ram
: Pentium IV 2.4 GHz.
: 40 GB.
: 1.44 Mb.
: 15 VGA Color.
: Logitech.
: 512 Mb.
 Software Requirements:
Operating system
Coding Language
Front End
: Windows 7 Ultimate (32-bit)
: ASP.Net with C#.
: Visual Studio 2010 Professional
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

17. EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc Networks

18. Thank you
EMAP: Expedite Message Authentication protocol for Vehicular Ad Hoc
Networks