Hedonic games model agents that decide which other agents they will join, given some preferences on other agents. We study Sybil attacks on such games, by a malicious agent which introduces multiple false identities, so that the outcome of the game is more interesting for itself. First taking Nash stability as the solution concept, we consider two simple manipulations, and show that they are es...

Vehicular Ad Hoc Network (VANET) or vehicle network is a technology developed for autonomous vehicles in Intelligent Transportation Systems (ITS). The communication system of VANET using wireless that potentially being attacked. Sybil attack one the attacks occur by broadcasting spurious information to nodes and could cause crippled network. strikes camouflaging themselves as node providing fal...

A wireless sensor network consists of many sensor nodes which are deployed to monitor physical or environmental conditions and to pass the collected data to a base station. Though wireless sensor network is subjected to have major applications in all the areas, it also has many security threats and attacks. Among all threats such as sinkhole, wormhole, selective forwarding, denial of service an...

Wireless sensor networks are used for many different applications these days such as in environment applications, military applications, queue tracking, etc. In today’s scenario, security in WSN is one of the major issue.WSN are vulnerable to different types of attacks due to various constraints such as low battery power, less memory, and associated low energy. These attacks lead to decrease in...

Mobile ad hoc networks (MANETs) are infrastructure-free in which nodes free to move any direction. These use specific routing protocols that can create a path between not within transmission range of each other. Because MANETs easy configure, they mostly used areas where infrastructure is available, such as military and rescue operations, etc. Due the open approach, always vulnerable external i...

A Vehicular Ad hoc Network is a collection of mobile hosts forming a temporary network without the aid of any established infrastructure. This flexibility in space and time induces new challenges towards the security needed to support secure communications. Indeed, VANET are subject to attacks due to their vulnerabilities; one of the most compromising attacks is the Sybil nodes attack. We prese...

The Sybil attack in unknown port networks such as wireless is not considered tractable. A wireless node is not capable of independently differentiating the universe of real nodes from the universe of arbitrary non-existent fictitious nodes created by the attacker. Similar to failure detectors, we propose to use universe detectors to help nodes determine which universe is real. In this paper, we...

he vehicular adhoc network is the decentralized type of network. The vehicle nodes can join or leave the network when they want. In the such type of network security, routing and quality of service are the three major issues of the network. In the network malicious node is present which is responsible to trigger various types of active and passive attacks. The Sybil attack is the active types o...