Enhanced security in spontaneous wireless ad hoc

IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
Volume: 03 Issue: 04 | Apr-2014, Available @ http://www.ijret.org 288
ENHANCED SECURITY IN SPONTANEOUS WIRELESS AD HOC
NETWORKS WITH INTRUSION DETECTION
Vani Menon C1
, Mary Mareena P V2
1
M.Tech Student, Department of CSE, NCERC, Kerala, India
2
Assistant Professor, Department of CSE, NCERC, Kerala, India
Abstract
Spontaneous ad hoc network is created by a set of nodes placed together in the close region for some cooperative activity. A complete
self-configured secure protocol uses the human interactions related with the activity to establish a basic service and security
infrastructure. In order to achieve this requirement, authenticating the individual node as they come in the range of wireless network
is needed. The secure protocol uses a hybrid symmetric or asymmetric scheme and the trust among users. The design of the protocol
permits sharing resources and offering new services between users in a secure environment. Malicious nodes send or forward the
data, which may disrupt the communication. The nodes in the network need to find out the malicious node. This paper describes a
secure protocol for the network. The main focus of this paper is on the network management, security analysis of the system and an
intrusion detection mechanism for spontaneous ad hoc network.
Keywords: spontaneous wireless network, secure protocol, public key, private key
-----------------------------------------------------------------------***-----------------------------------------------------------------------
1. INTRODUCTION
Mobile ad hoc network (MANET) is a dynamic wireless
network that offers significant advantages that appear very
promising to suit challenging requirements of novel
applications. MANETs support spontaneous networking and
that has turned mobile ad hoc networking into a hot topic in
research. Spontaneous wireless networks are regarded as
interesting solutions to extend wireless networks
disadvantaged by increasingly heavy smart phone data
communications. In addition, spontaneous networks can
extend the reach of wireless internet access without any fixed
infrastructure. In this network, the nodes establish routing
among themselves dynamically to form their own network as
shown in Figure-1.
Fig -1: Spontaneous network model
The networked devices presently run towards infinity and the
administration effort for managing these devices also have
increased. Spontaneous networks can reduce the effort to
integrate devices and services into network environments with
the intention to have instant service availability with no
dependence on a central server. A spontaneous network is
defined as an ad hoc network that is built spontaneously as
devices connect. This network enables a natural form of
wireless computing when humans interact with each other. A
Spontaneous Wireless Ad Hoc network is formed, when two
or more nodes come together in the closed area for
communication and to share the resources for the duration of
limited time. Users are automatically connected to the
network, establish their needed channels and share services.
The main purpose is to facilitate secured spontaneous
networking in a user friendly way. Automatic device
integration into network environments enables the device to
communicate with others.
The requirements for the configuration services of these
networks depend mainly on size of the network, the nature of
cooperation among nodes and on the applications that are
running. The tasks to be carried out in the configuration of
these types of networks include the identification of nodes and
their authorization, address assignment, service name and
security. Nodes are free to join or leave the network as it
might be susceptible to attack if nodes involved are not
trusted. Security has become a primary concern in order to
provide confined communication in a dynamic environment.

__________________________________________________________________________________________
Ad hoc spontaneous networks require a protocol which adapts
to any number of dissimilar nodes. The network and protocol
based on user trust can establish a secured self configured
environment for data sharing and resources and services
distribution among users. By building a trust network and on
the user service needs, security is established. This enables to
obtain a distributed certification authority which is necessary
to build trust networks. The network permits users to connect
because it belongs to someone who knows it. We used to
concern asymmetric cryptography where every device has a
public-private key pair for discovering the device and also
symmetric cryptography to share session keys among nodes.
Authentication and trust phase is used to solve the security
issues. There are unidentified users, because validity and
privacy depends on user identification [1].
In wireless communication technologies, security has a
primary concern in effort to give secure communication in a
hostile wireless environment. Nodes can be easily captured
and fake messages can be injected into the network. Several
approaches for securing communication in ad hoc networks
have been proposed. Here the protocol based on user trust
offers security while requiring less energy. In order to attain
an acceptable level of security without affecting their
efficiency, intrusion detection approach is proposed. This
mechanism can extend the network security by finding out
intruders. Furthermore, stream cipher introduced to enhance
the performance when transferring data among nodes. Salsa20
offers a much better speed security profile than the block
cipher AES [2] [3]. Stream ciphers have limited or no error
propagation whose block diagram is shown in Figure-2 with
the plaintext and the corresponding encrypted cipher text. The
cipher text is the xor of the plaintext and the stream, where
stream is determined by the key and nonce. In Salsa20 the
reduced round ciphers provides an attractive option for users
who considers more importance to speed.
Key
Ki
Pi Ci
Fig -2: Stream cipher
2. RELATED WORK
An ad hoc network must operate independent of an access
point infrastructure, whereas still offering essential
administrative services to support applications. In an ad hoc
environment, nodes have to cooperate to provide the
functionality of group communication. Security in fixed
network relies on a central server to certify nodes that want to
communicate with each other but this is not the case with
spontaneous network. The phase of authentication and trust is
a fundamental topic in the environment of security in
spontaneous networks [4].
The methods used earlier enable the users to get the service
required without any external infrastructure. The nodes
participating may not be able to execute routing and security
protocols. The design and use of adaptive routing and security
mechanisms is necessary for any type of devices and
scenarios. It is difficult to manage the dynamic networks
which are with flexible memberships, group and distributed
signatures. Key exchange mechanisms for user authentication
and node authorization are required to obtain a reliable
communication. The methods adopted are not enough for
spontaneous networks since they need configuration to
perform initially.
Zhu et al. [5] developed a scalable and light-weight secure
protocol for ad hoc networks. Most of the routing protocols for
ad hoc networks do not apply network access control. This
causes the networks susceptible to resource consumption
attacks where a malicious node injects erroneous routing
updates into the network with the goal of paralyzing the
network. In order to prevent such attacks, it is necessary that a
node joining ad hoc network employs some authentication
mechanisms. Using Lightweight Hop by Hop Authentication
protocol trust relationship with its neighbours can be
bootstrapped.
Backstrom et al. [6] developed the first real spontaneous
network using the Jini technology that offers services
dynamically. New units can be easily added and makes
possible to connect any device to the network irrespective of
the operating system. A contract is initiated when the service
provider unit joined the network and the duration of the
service depends on the contract. The evolved technologies like
Jini can ensure interoperability between different systems, but
this is not spontaneous.
Untz et al. [7] proposed a lightweight interconnection protocol
appropriate for spontaneous edge networks. For spontaneous
edge networks, here it proposed and implemented Lilith which
is a prototype of an interconnection node. The main objective
is to support TCP or IP applications without configuration. To
allow different communication paths on a per flow basis, it
uses Multi protocol label switching. It presents seamless
switching between operational and back-up paths, and the
information will reach on destination reachability. Load
balancing or traffic isolation for different QoS classes is
provided through multiple paths. The wireless spontaneous
network is of dynamic topology which causes routes to
frequently appear and disappear. This can be solved by Label
Switched Paths which enable the nodes to detect broken paths.
But it does not have any security mechanisms.
Key stream generator

__________________________________________________________________________________________
Danzeisen et al. [8] apply Wireless Encryption Protocol
(WEP), the regular security mechanism used in Wireless
LANs. Building spontaneous networks between two or more
nodes for communication was enabled by wireless
communication technology. It is easy for the formation of
spontaneous networks among heterogeneous node with
cellular framework. Communication channel uses security
parameters which depend on a specific technology. In
Wireless LAN, wireless encryption protocol is available but it
is more susceptible to hacking attacks.
Czerwinski et al. [9] introduced an architecture and
implementation of a secure Service Discovery Service (SDS).
Clients as well as Service providers use SDS to create
complex queries for locating these services and to advertise
complex descriptions of existing running services respectively.
It facilitates the network enabled devices to discover available.
The core component of secure service discovery service is
security and, communications are both encrypted and
authenticated. Certificate authority signs certificates, whose
public key is known to everyone. The components include
clients which want to discover services that are running in the
network and servers respond to client queries. To control the
access to service information, it uses a hybrid access control
list.
3. SECURITY IN SPONTANEOUS NETWORK
A security protocol based on trust permits the creation and
management of distributed and decentralized spontaneous
networks with little interference from the user, and the
incorporation of different devices. The infrastructure less
network is aimed to encourage a wireless interaction. Because
wireless interaction depends on physical proximity, it imitates
the way humans communicate. The following steps must
follow when a device joins the network.
1. Join the device into the network
(a) Agree the broadcast protocol and speed.
(b)Configure IP address, routing information and other
type of information
2. Discover services and resources shared by the devices
(a) Update the list of available services and resources
(b) Share the services discovered
3. Access to the service offered by the devices
(a) Handle the automatic configuration tasks and security
access to the services
(b) Joining and leaving a network have to be managed
4. Cooperative tasks
(a) Cooperation of various members within the intranet
(b) With other communities on the internet
Spontaneous networks imitate human relations which are
taken into account for the security. Spontaneous ad hoc
networks have many applications in the areas include
industrial, business, military and teaching. It can be used
during emergency situations in order to establish
communication fast and reliably. Secure communication is
guaranteed with cryptographic techniques. The requirements
of security in spontaneous networks are the same as used in
traditional networks such as privacy, integrity, verification,
confidentiality and availability [10], [11].
3.1 Network Creation
The network is created using the information provided by the
users. The establishment of a network allows the devices to
communicate. It involves the automatic configuration of
logical and physical parameters. The system is purely based
on the use of an Identity Card (IDC) and a certificate. The IDC
consists of public and private components for the operation.
The public component consists of a Logical Identity (LID),
which is unique for each node participating. LID consists of
information such as name, picture or other type of user
identification. It also contains public and private keys of the
user. The public key is sent to other users. The creation and
expiration date, IP proposed by the user and user signature
generated using the Secure Hash Algorithm (SHA-1) are the
other type of information included. Private key is included in
the private component. Central Certification authority is not
required to validate IDC. It is done by any of the trusted
nodes. The exchange of IDC among nodes grows the trusted
network.
When a node wants to make communication with another
node and it does not have that node’s certificate, it is possible
to requests from its trusted nodes. The system will validate the
data after receiving the certificate. If the data is correct, then it
will sign as a valid node. Every node can make requests as
well as serve requests for authentication or information from
other nodes. The nodes can act as clients as well as servers at
the same time
Spontaneous network is created by the first node as shown in
Figure-3 and generates a session key arbitrarily, which will be
shared with the new nodes coming after the verification phase.
Network security and user data are configured by the second
node and authenticates against the first node. Additional nodes
authenticates with any other node in the network. A node
which joins onto a network must go through some phases:
verification and authorization of node, session key agreement,
transmission protocol and speed, IP address checking and
routing.

__________________________________________________________________________________________
Start No
Yes
No
Yes
Yes
End
Fig -3: Network creation
Spontaneous network is created by the first node as shown in
Fig. 2 and generates a session key arbitrarily, which will be
shared with the new nodes coming after the verification phase.
Network security and user data are configured by the second
node and authenticates against the first node. Additional nodes
authenticates with any other node in the network. The nodes
can act as clients as well as servers at the same time.
3.2 Authentication Control
After a node joined onto the network, it sends an
authentication message with its LID to its neighbor nodes.
When the receiver node receives the message, it validates the
received data in order to check that the data has not been
already used in the network. It sends a broadcast message to
other nodes present in the network to recheck that the data has
not been used. If no such data present, then the node is
validated and thus gets trusted. The trusted node’s data is
saved which then can perform several tasks. The tasks include
display and modify the trust of the nodes, update the
information, process the authentication request, reply and
forward an information request, send data to nodes and leave
the network.
3.3 Protocol Implementation
Security in the network depends on the symmetric and
asymmetric key encryption mechanisms. Session key
generated is used to encrypt the confidential messages among
trust nodes. The algorithm used for the symmetric encryption
scheme is Advanced Encryption Standard whereas for
asymmetric key scheme is Rivest, Shamir and Adleman.
Session key and node authentication process are distributed
using asymmetric key encryption.
User only determines whether have to build a network or to
join in an existing one once validation is completed. The node
that wants to join a spontaneous network begins the procedure
by sending a Discovery request packet to the destinations. The
packet contains the LID of the sending node. The receiving
packet contains the LID and IP address of the destination. The
data received is used to study the chosen device to
authenticate. Authentication request and reply packets, IP and
e-mail checking packets are used for device authentication.
3.4 Session Key Revocation
The certificate of a node has an expiration time. The node
must authenticate with the device after this session or else, the
device is blocked. The session key is kept by the node until it
leaves the network. The spontaneous network is typically
arranged for a reduced time slot, which is usually not very
extensive. When a node is left from the network during the
period of time when the session key has been renewed, it will
not be capable to access the network until it is authenticated
again with some node present in the network. When the
session key is about to expire, it sends a broadcast message to
other nodes and not all nodes leave from the network at the
same time.
3.5 Confidential Data Sharing
In a spontaneous network, when a node has to send data to
another node or device, it is possible to send the data to either
a single node or to all nodes. All the nodes can receive data
only if it is sent in plaintext whereas a single node can receive
the ciphered data. When the node received the data, it has to
decrypt it with the model of encryption used by the source
node. By session key generation, the data is distributed
between two trusted users and encrypting their files. The user
can access the resource only with the encrypted key if the user
has the privilege to the resource sent. There are several options
provided with the nodes to send the data. It can be sent
symmetrically or asymmetrically encrypted, or as unencrypted
which chosen by the sender.
4. PROPOSED SYSTEM
Intrusion Detection mechanism is introduced in order to
achieve an acceptable security level in spontaneous ad hoc
networks. The trust based approach along with the intrusion
Generate a network
key
Is there a
network
connection
Exchange IDC
Authentication and
session key agreement
Agree
transmissio
n protocol
IP assignment
IP
duplicatio
n?

__________________________________________________________________________________________
detection mechanism enhances the security services that are
required by the users. Encryption and authentication are
normally the first level of security when an intrusion takes
place. Secure Hash Algorithm is used to generate the digital
signature on the encrypted data. And verifying the signature is
done by the node receiving data. If the data are identical, the
receiver node accepts the data, otherwise the data has been
tampered. An alert about the intruder is then given to the
nodes and thus they can avoid the paths that include
compromised nodes. The proposed system of Intrusion
Detection is shown in Figure-4.
Fig -4: Proposed system of Intrusion Detection
5. EXPERIMENTAL RESULTS
Average computation time (in milliseconds) has been used to
compare the performance of algorithms. Salsa20 provides
consistent high speed in a wide variety of applications. The
performance of the current approach was compared on the
basis of the time required for the packet size to be transmitted
which is shown in Figure-5. In this the packet size varies from
1 MB to 3 MB. It can be seen that the encryption scheme by
using salsa20 in the secure protocol for spontaneous network
has the lower execution time compared to other symmetric and
asymmetric algorithms.
0
20
40
60
80
100
120
140
160
1 MB 2 MB 3 MB
AES
RSA
SALSA
Fig -5: Performance evaluation
6. CONCLUSIONS
The design of the protocol permits secure communication
among nodes in a spontaneous wireless ad hoc network.
Human relations approach is used in the work done. These
networks are developed to accomplish a task on a limited
period of time and space. All the nodes need to cooperate for
the configuration and management of the network. The
devices share the required information to be trusted eventually
they gain access to the network. The different users present in
the network offers various resources which can be accessed by
all other users in the network. It is not necessary for the
devices to keep the public keys of the network and
information within it. A unique IP address needs to be
assigned to each device in order to get configured. It is
suitable to be used in resource constrained devices. Security
schemes are included using cryptographic techniques. The
secure protocol allows confidential data sharing among trusted
nodes. And the intrusion detection approach protects the
network and enhancing the level of security in ad hoc
networks.
REFERENCES
[1]. Raquel Lacuesta, Jaime Lloret, Miguel Garcia, and
Lourdes Penalver,“A Secure Protocol for Spontaneous
Wireless Ad Hoc Networks Creation,” IEEETransactions on
Parallel and Distributed Systems, Vol. 24, No. 4, April 2013.
[2]. D. J. Bernstein, “The Salsa20 Stream Cipher,” SKEW,
http://cr.yp.to/snuffle.html, Accessed April 2013
[3]. D. J. Bernstein, “The Salsa20 family of stream ciphers,”
New Stream Cipher Designs, LNCS vol. 4986, pp. 84-97,
Springer, Heidelberg, 2008
[4]. L.M. Feeney, B. Ahlgren, and A. Westerlund,
“Spontaneous Networking: An Application- Oriented
Approach to Ad-hoc Networking,” IEEE Comm.Magazine,
vol. 39, no. 6, pp. 176- 181, June 2001.
[5]. S. Zhu, S. Xu, S. Setia, and S. Jajodia, “LHAP: A
Lightweight Hop by-Hop Authentication Protocol For Ad-Hoc
Local data collection
Local detection
Cooperative
detection
Normal
profile
Alert
manageme
nt
Audit data source
Misuse detection

__________________________________________________________________________________________
Networks,” Ad Hoc Networks J., pp. 567-585, vol. 4, no. 5,
Sept. 2006.
[6]. J. Backstrom and S. Nadjim-Tehrani, “ Design of a
Contact Service in a Jini-Based Spontaneous Network,” Proc.
Int’l Conf. and Exhibits on the Convergence of IT and
Comm., August 2001.
[7]. V. Untz, M. Heusse, F. Rousseau, and A. Duda, “Lilith:
an Interconnection Architecture Based on Label Switching for
Spontaneous Edge Networks,” Proc. First Ann. Int’l Conf.
Mobile and Ubiquitous Systems: Networking and Services
(Mobiquitous ’04), August 2001.
[8]. M. Danzeisen, T. Braun, S. Winiker, D.
Rodellar,“Implementation of a Cellular Framework for
Spontaneous Network Establishment,” Proc. IEEE Wireless
Comm. And Networking Conf. (WCNC ’05), March 2005.
[9]. S.E. Czerwinski, B.Y. Zhao, T.D. Hodes, A.D. Joseph,
and R.H., “An Architecture for a Secure Service Discovery
Service,” Proc. ACM/IEEE MobiCom, Aug. 1999.
[10]. R. Lacuesta, J. Lloret, M. Garcia, and L.Penalver,“A
Spontaneous Ad-Hoc Network to Share WWW Access,”
EURASIP J. Wireless Comm. and Networking, vol. 2010,
article 18, 2010.
[11]. Payal A.Pawade and V.T.Gaikwad “Authenticating
Protocol for Spontaneous Wireless Ad Hoc Networks”,
International Journal of Computer Science and Management
Research, vol.2, Issue-5, May 2013.

Enhanced security in spontaneous wireless ad hoc

More Related Content

What's hot (19)

Viewers also liked (20)

Similar to Enhanced security in spontaneous wireless ad hoc (20)

More from eSAT Publishing House (20)

Recently uploaded (20)

Enhanced security in spontaneous wireless ad hoc