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Ramakrishnan B.,S T Hindu College | Bhagavath Nishanth R.,Velammal Engineering College | Milton Joe M.,St Jeromes College | Selvi M.,S T Hindu College
Wireless Networks | Year: 2015

Broadcasting is one of the major emergency services of Vehicular ad hoc network, since the number of vehicles increases every day. Because of the high density of the vehicles, it is necessary to broadcast emergency messages to all the vehicles to avoid traffic jam and vehicle accidents. Reliable broadcasting of messages in self-organizing Ad hoc networks is a promising research field. In this paper a cluster based emergency message broadcasting algorithm is proposed. In this regard we have proposed cluster based architecture for emergency message dissemination and collision avoidance in VANET. In this paper, first the formation of cluster is done in such a way that it avoids any kind of collision. Once cluster head is selected it takes the responsibility of intra cluster management to avoid interference between the clusters. To increase the reliability during emergency message dissemination two MAC layer broadcasts protocol is used. This assures that message is delivered on time without any hazards. The proposed model is simulated for DSDV, AODV, and DSR protocols with the standards 802.11 and 802.11p in SHWM, Manhattan and freeway mobility models. © 2015 Springer Science+Business Media New York Source

Ramakrishan B.,Sthindu College | Milton Joe M.,St Jeromes College | Bhagavath Nishanth R.,Velammal Engineering College
Journal of Emerging Technologies in Web Intelligence | Year: 2014

Pattern design plays a vital role in establishing network communication in Ad-hoc network scenario. The real challenge to the researchers is designing the communication architecture to vehicular network. Vehicular network architecture design is difficult, since the movement of the vehicle speed is high. The existing vehicular network architecture forms the network communication but the communication is not reliable and the message transmission time is high. However a new architecture design is required to establish fair network communication among vehicles. This paper presents a novel cluster based vehicular network architecture for Manhattan Mobility Model and the proposed model is analyzed with various routing protocols. The result and analysis of the proposed model show clearly that the Cluster based Manhattan Mobility Model produces reliable communication. The proposed Cluster scheme reduces the message transmission time obviously. © 2014 Academy Publisher. Source

Milton Joe M.,St Jeromes College | Ramakrishan B.,Sthindu College
Journal of Emerging Technologies in Web Intelligence | Year: 2014

Online Social Network (ONS) is the easiest platform to connect with one another. There are many Online Social Networking websites exist to bring up the reliable communication among the users. Facebook, Orkut, Google+, Twitter, MySpace, etc are some of the Online Social Networking websites. All the social networking websites provide the interface formally known as profile, to share their willingness with others. The users of these websites could share their feelings, photos, text file and even whatever the user wishes to provide. All the Online Social Networking websites bring the friends, family members and relatives together to share their desires in a fast track manner, however still it lacks in security module. The shared photos and information are freely open access to all the users of social networking websites. When the photos are freely available, the unauthorized users can easily access the photos of others and download it. Once the photo is downloaded, that image can be misused widely such as creation of fake profile and the photo can be sold to other nuisance websites. This kind of data hacking activities in online social networks even leads the life to death. In this paper, data hacking in online social network is considered and a novel mechanism is presented to prevent the data hacking. © 2014 Academy Publisher. Source

Joe M.M.,St Jeromes College | Ramakrishnan B.,St Hindu College
Peer-to-Peer Networking and Applications | Year: 2016

Online Social Network (OSN) is the most widely used platform to communicate with one another. It is fast and cheap when compared to other modes of communication. However, Online Social Network profiles are being hacked often by employing various types of malicious attacks. Most of the times the attackers are successful in accessing the OSN account which illustrates that the present authentication mechanisms are not efficient enough. Once an online social network account is being hacked, it can be misused widely and the hacker makes the authorized user unable to login to the account by changing the login credentials. Security in OSN must be provided and it must prevent the attacks aimed by the attackers. However, to prevent unauthorized access in OSN a novel authentication procedure is needed and the novel authentication mechanism must abide the social network platform’s characteristics. This paper considers the attackers who aim to access the OSN account in an unauthorized manner and presents two novel authentication mechanisms to prevent the OSN platform. The proposed procedures make use of users’ chatting module statistics and relationship circle statistics to authenticate the users in Online Social Networks. This can be done by Multi kernel Fuzzy C-Means (MKFCM) Algorithm and Group Search Optimizer (GSO). These novel authentication procedures abide the OSN characteristics, as it makes use of Chatting and Relationship module. © 2016 Springer Science+Business Media New York Source

Ramakrishnan B.,St Hindu College | Bhagavath Nishanth R.,Velammal Engineering College | Milton Joe M.,St Jeromes College | Shaji R.S.,Noorul Islam University
International Journal of Wireless and Mobile Computing | Year: 2015

Mobility model of a Vehicular Ad Hoc Network (VANET) is one of the key determinants for developing routing protocol for vehicular communication. The mobility pattern in the mobility model is used to simulate the movement characteristics of the vehicles, which plays an eminent role for developing an efficient routing protocol for vehicular network. The main role of the mobility model in a VANET is to influence the route discovery mechanism, reconstruction of failure links and caching procedures. This paper describes Highway, Manhattan and Freeway mobility models that represent the mobile vehicles and their movement is completely dependent on other vehicles. This paper also presents the simulation results that illustrate the importance of various routing protocols, cluster schemes and the standard 802.11p. The simulation output demonstrates how the performance of VANET routing protocol changes significantly, when the mobility model is changed. © 2015 Inderscience Enterprises Ltd. Source

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