Proposal: An Efficient Security and Privacy Scheme based on Elliptic Curve Cryptography (ECC) for Vehicular Ad hoc Network (VANET)

International Journal of Engineering and Management Research e-ISSN: 2250-0758 | p-ISSN: 2394-6962
Volume-10, Issue-4 (August 2020)
www.ijemr.net https://doi.org/10.31033/ijemr.10.4.23
160 This work is licensed under Creative Commons Attribution 4.0 International License.
Proposal: An Efficient Security and Privacy Scheme based on Elliptic
Curve Cryptography (ECC) for Vehicular Ad hoc Network (VANET)
Israa M. Al-dulaimi1
and Ayman Khalil1
1
Student, Faculty of Engineering, Islamic University of Lebanon, Beirut, LEBANON
2
Lecturer, Faculty of Engineering, Islamic University of Lebanon, Beirut, LEBANON
2
Corresponding Author: ayman.khalil23@gmail.com
ABSTRACT
Vehicles in a vehicular ad-hoc network (VANET)
broadcast information about the driving environment in the
road. Due to the open-access environment, this means that
the VANET is susceptible to security and privacy issues.
However, none of the related works satisfies all security and
privacy requirements. Besides, their proposed has huge
overhead in terms of computation and communication. To
address the above issues, we will propose the security and
privacy scheme based on Elliptic Curve Cryptography (ECC)
and one secure hash function. Hence the reliability of each
message being signed and checked has been improved. The
main aim of this work is to satisfy all aspect requirements of
security and privacy and reduce the computational
complexity of the system.
Keywords— Elliptic Curve Cryptography, Vehicular Ad
hoc Network, Security, Privacy
I. INTRODUCTION
Recently, vehicle ad hoc networks (VANETs)
have become particularly involved in the use of protection
and traffic services[1][2][3]. Vehicles in these technologies
are equipped with a wireless transmission instrument and
can send and receive messages with significantly higher
movements compared to mobile ad-hoc networks
(MANET)[4]. The traffic information is shared between
vehicles as they move on the network. This helps drivers to
control their ways of avoiding crowds, get warnings about
road conditions and be alerted in advance of potential
traffic coincidence[5][6][7].
A VANET consists of both vehicles and roadside
units (RSUs). Vehicles are equipped with on-board units
(OBUs) which indicate to wireless communication
devices, therefore allows vehicles to exchange information
related to traffic with each other and nearby RSUs[8][9].
The communication of VANET can divide into two
modes, vehicle-to-vehicle (V2V) communication and
vehicle-to-infrastructure (V2I) communication[10],
[11][12].
VANETs have several exciting applications that
could benefit tremendously from our driving experience as
already described. Still, the blade is double-edged.
Security and privacy issues should be carefully considered
in VANET[13]. Malicious vehicles can disturb the traffic
road and obtain the desired benefits. For example, the
malicious vehicle that produces messages to create an
emergency situation to misinform other vehicles to slow
down, pull over and yield; a compromised vehicle that acts
as an RSU can misinform other vehicles to a particular
location and trigger a traffic problem. If an attacker
continues jamming a large number of bogus messages into
a VANET, normal receipt and authentication of messages
would be delayed; private information such as the driving
route of legitimate drivers may be leaked if the attacker
passively scans traffic-related messages in a given area.
Obviously, such attacks may cause serious
problems and can lead to traffic accidents. Therefore, it is
imperative to develop protection and privacy measures to
avoid these malicious attacks before VANET applications
are deployed and put into commercial use.
Therefore, we propose an efficient security and
privacy scheme against attacks and reduce the overhead of
the system in terms of computation and communication
cost. The rest of this paper is organized as follows. We
bring some related work in Sect. II. In Sect. III, we present
the background of the proposed scheme. Section IV
describes the phases of the proposed scheme. A conclusion
is finally stated in Sect. V.
II. RELATED WORK
Recently, many research proposed security and
piracy scheme for V2V and V2I communications in
VANET. In this section, we present the existing schemes
related to our proposed scheme as follow,
In 1984, Shamir published the first work using
ID-based schemes [14]. The identification information is
used as the public key of the node, while private keys are
generated via a TA and then distributed to nodes using the
same identity information. The recipients validate the
message via the public key of the sender and sign the
message using the private key of the sender. Zhang et al.
[15][16] used the vehicle user's identity in an ID-based
scheme in which a vehicle does not need to save a large

number of public and private keys and their certificates.
This scheme therefore
Mitigates the amount of storage needed as well as
the communication and computation costs. Additionally, it
avoids the need for certificate management and a CRL.
The schemes proposed by Zhang et al. [15][16] support
batch verification based on bilinear pairing for the
messages received by a vehicle and an RSU, and thus
achieve low verification costs, allowing several messages
to be verified concurrently. In 2009, Jiang et al. [17] used
an ID-based scheme to propose the binary authentication
tree (BAT) for V2I communication. BAT achieves high
efficiency and meets the security and privacy requirements
in VANETs. In 2011, Huang et al. [18] proposed a new
authentication scheme termed PACP, which depends on
using pseudonyms rather than real identities, providing
conditional privacy and efficiency in performance. Chim et
al. [19] and Lee and Lai [20] pointed out, in 2011 and
2013 respectively, that the schemes proposed in [15][16]
have flaws that mean that an OBU can use a fake identity
to eliminate the traceability requirement. In the same
context, Bayat et al. [21] introduced new protection and
privacy-preserving scheme based on RSU. In this system,
the RSUs are stored in the RSU's tamper-proof computer
master keys. Ming and Cheng [22] have introduced an
elliptic curve-based, certificateless conditional privacy
security scheme.
III. BACKGROUND
A. Problem Sstatement
Detailed documentation is available in IEEE Trial
Use Standard [23] for VANET security, including a choice
of cryptograms. The rests of VANET components must
sign messages with their private keys to authenticate a
message sender and ensure the integrity of the message
before transmitting traffic-related messages.
Figure 1 presents the format of a [23] signed
traffic-related message. We can see for every 69-byte
VANET message that a 125-byte certificate and a 56-byte
ECDSA signature must be attached. Of course, the
overhead cryptography (the certificate and the signature)
constitutes a large part of the total packet size.
Figure 1: Signed Message Format
B. System Model
1-TA: Is a completely trusted party in a VANET
and is responsible for initializing and supplying RSUs and
vehicles with device parameters including public and
private key pairs.
2-RSU: They are situated along the road as
vehicle routers, and are considered part of the network
infrastructure. An RSU manages the connectivity of all
OBUs within its region and publishes messages relating to
traffic[24].
3-OBU: An OBU is a radio system mounted in a
vehicle operating on the DSRC protocol for transmitting
and receiving beacons from other rest of VANET
components.
C. Security and Piracy Requirements
The proposed scheme should be satisfying
security and piracy requirements as follows,
1-Privacy-preserving: The scheme must satisfy
the privacy protection requirement in a VANET, ensuring
that private information about vehicles such as their
location and identification should be protected and should
not be exposed by the broadcast messages.
2-Authentication and integrity: A receiver
(vehicle or RSU) should have the capacity in a VANET to
check the receiving beacon and make sure the sender is
legitimate. In addition, the beacon's material should be
checked to ensure it was delivered without abuse.
3-Traceability and revocation: These are essential
criteria in a VANET, as they provide anonymity on
condition. This means a TA should be able to track a
malicious vehicle, disclose its original identity and revoke
it from continuing to participate in VANET.
4-Unlinkability: Malicious vehicle does not have
the ability to link two or more message which sent by the
same sender.
5-Security attacks resistance: An successful
scheme in a VANET can withstand general attacks such as
MITM attacks[25], replay, modification [26] and
impersonation.
D. Research Methodology
As Figure 2, to attain the objectives, several
methodological stages are followed:
1-review of the literature,
2-development of a new framework,
3-design and implementation,
4-testing and evaluation
In the first stage, the research problem is defined
comprehensively analyzed through a critical review of
existing schemes. In the second stage, the solution to the
research problem is presented. The solution consists of
several phases that select preliminaries, select phases and
design scheme.

Figure 2: Main Stages of the Research Process
IV. PROPOSAL SCHEME
VANETs' protection and privacy concerns
surrounding V2I and V2V contact should be handled
carefully as soon as possible. Several researchers have
recently suggested schemes for the widespread deployment
of VANETs to cope with the above-mentioned problems.
The proposed scheme typically has the following four
phases: initialization of the system, signing message,
verification message and trace of the original identity. The
TA is responsible for defining and transmitting public
parameters of the scheme to the rest of the entities in
VANETs. The vehicle should be authenticated to that TA
during the joining process, in order to exchange a traffic-
related message based on the parameters via secure
communication. The vehicle then computes its signature
message and the verifier checks those signatures. If a
complaint is received about a malicious vehicle, the TA
should be able to locate and revoke the malicious vehicle
by disclosure of the vehicle's original identity.
A. Initialization Phase
The TA is responsible for measuring the system-
based ECC 's public parameter {p, q, a, b, P} and
transmitting it to the remaining entities in VANETs.
B. Signing Message Phase
After the vehicle entering the RSU, it signs the
message M_i in{0, 1}^* with its pseudonym PID_i,
chooses random r in Z_q^*, picks the timestamp and
calculates the signature sigma_i.
C. Verification Message Phase
The timestamp validity is checking firstly after
the checking receiver receives the message M_i. If new,
By one of the following, it begins to verify the message
M_i:
1-Single verification message (SVM)
In this method, checking receiver checks the
signaturesigma_i on message M_i for pseudonym identity
PID_i from a vehicle V_i. If the signature sigma_m is not
ligimtate, the receiver does not accept the message M_i.
Otherwise, it accepts the message M_i.
2-Batch verification message (BVM)
If the checking recipient receives a large number of
messages {M_1, PID_1, sigma_1}, {M_2, PID_2,
sigma_2},......,{M_n, PID_n, sigma_n}, the signatures
can be at the same time checked. In this method, vehicle
gets a signatures batch sigma_i = {sigma_1, sigma_2,
...., sigma_n} on n messages M_i ={M_1,
M_2,.......,M_n} for n pseudonym PID_i= {PID_1,
PID_2, ......, PID_n} from n vehicle V_i = {V_1, V_2,
....., V_n}, where i= {1, 2, ....,n}. If the signature
sigma_i is not legitimate, the vehicle does not accept the
messages M_i. Otherwise, it accepts message M_i.
D. Original Identity Trace Phase
In this method, when RSU broadcasts the report
to TA about an unauthentic vehicle, which should be able
to track and prevent the malicious vehicle by disclosing the
vehicle's original identity.
V. CONCLUSION
Owing to the nature of an open-access
environment, VANETs can cause serious challenges and
problems. An efficient, conditional privacy-preserving
authentication scheme for secure V2V and V2I
communication is proposed in this paper. The purpose of
the proposed will be to resist attacks on model safety and
to meet security and privacy requirements in VANETs.
Future work will be to implement the security and privacy
scheme, in addition to evaluating and comparing the
performance parameter related to the computation and
communication model between the proposed and other
existing schemes.
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