Sybil attacks pose a serious threat for Wireless Sensor Networks (WSN) security. They can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. In a Sybil attack, the attacker masquerades as multiple sensor identities that are actually controlled by one or a few existing attacker nodes. Sybil identities are fabricated out of stolen keys, obt...

sybil attacks pose a serious threat for wireless sensor networks (wsn) security. they can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. in a sybil attack,the attacker masquerades as multiple sensor identities, that are actually controlled by one or a few existing attacker nodes. sybil identities are fabricated out of stolen keys, obt...

In traffic safety applications of Vehicular Ad-hoc Networks (VANETs), security is a very important issue. Sybil attack is a particular attack where the attacker illegitimately claims multiple identities. In the past, several approaches have been proposed to solve this problem. They are categorized into PKI-based, infrastructure-based, observer-based, and resourcetesting-based schemes. In this p...

Due to broadcast nature of Wireless Sensor Networks and lack of tamper-resistant hardware, security in sensor networks is one of the major issues. Hence research is being done on many security attacks on wireless sensor networks. Sybil attack is a particular harmful attack. When a node illegitimately claims multiple identities or claims fake id, is called Sybil attack. This paper focuses on var...

Vehicular Ad-Hoc Networks (VANET) generalization of Mobile Ad Hoc Networks (MANET) are proclaimed for extreme mobility as compared to MANET. Motivation of VANET is Traffic Administration and Human Protection. Misuse of utilities provided by VANET is more prone to attacks like Black Hole Attack and Sybil Attack. This paper is fascinated towards recognition and eviction of Sybil Attack in VANET. ...

Security is an important issue in the VANET environment and the Sybil attack affects it the most. In Sybil attack a node illegally claims itself as a legitimate node using multiple identities. This paper systematically analyses about Sybil attack and its effect in the VANET. We establish a Signal and Time clustering (STC) algorithm to detect the Sybil attack in VANET. The scheme provides a low ...

Sybil attacks have been shown to be unpreventable except under the protection of a vigilant central authority. We use an economic analysis to show quantitatively that some applications and protocols are more robust against the attack than others. In our approach, for each distributed application and an attacker objective, there is a critical value that determines the costeffectiveness of the at...

Sybil attack is a security threat wherein an attacker creates and uses multiple counterfeit identities risking trust and functionality of a peer-to-peer system. Sybil attack in vehicular ad hoc networks is an emergent threat to the services and security of the system. In the highly dynamic environment of vehicular ad hoc networks, due to mobility and density of nodes, it is challenging to detec...

MANET is an independent and infrastructureless network comprising of self configurable mobile nodes connected via wireless links. MANET is susceptible to various attacks because of some loopholes present in MANET like dynamic topology, zero central administration, limited physical security etc. MANET is prone to numerous malicious attacks one such attack among them is SYBIL ATTACK. In Sybil att...

MANET is a kind of wireless network which is decentralized in nature and comprise of moving mobile nodes. Due to changing topology of such network it impose critical security protocol design against harmful attacks such as Sybil Attack. In a Sybil attack a malicious node can produce and manage a large number of logical identities on a single physical device. This gives the misapprehension to th...