In multi-hop wireless systems, the need for cooperation among nodes to relay each other's packets exposes them to a wide range of security attacks. A particularly devastating attack is the wormhole attack, where a malicious node records control traffic at one location and tunnels it to another compromised node, possibly far away, which replays it locally. Routing security in ad hoc networks is ...

Vehicular Ad Hoc Network (VANET) is a wireless network formed between a collection of vehicles connected through wireless connections. VANETs can help increase the passengers‟ comfort, safety, efficiency and convenience by providing them with information about the ongoing road status and other relevant road information. VANETs, similar to other networks, face numerous security threats. One such...

Wireless Sensor Network (WSN) is an emerging technology that shows great promise for various futuristic applications both for mass public and military. These small, low-cost, low-powers, multifunctional sensor nodes can communicate in short distances. There is currently enormous research potential in the field of wireless sensor network security. The major challenge for employing any efficient ...

Security is the major area of concern in communication channel. Security is very crucial in wireless sensor networks which are deployed in remote environments. Adversary can disrupt the communication within multi hop sensor networks by launching the attack. The common attacks which disrupt the communication of nodes are packet dropping, packet modification, packet fake routing, badmouthing atta...

The wormhole attack is considered a serious threat to the security in multi-hop ad hoc networks. In wormhole attack, the attacker makes the tunnel from one end to another network, the nodes are in a different place at both ends of the tunnel believe are true neighbours and gets the conversation through the wormhole link . Unlike many other ad hoc routing attacks, worm hole attack cannot be prev...

Communication in mobile Ad hoc networks is completed via multi-hop ways. Owing to the distributed specification and restricted resource of nodes, MANET is a lot prone to wormhole attacks i.e. wormhole attacks place severe threats to each Ad hoc routing protocol and a few security enhancements. Thus, so as to discover wormholes, totally different techniques are in use. In all those techniques fi...

Obtaining user opinion (using votes) is essential to ranking user-generated online content. However, any content voting system is susceptible to the Sybil attack where adversaries can out-vote real users by creating many Sybil identities. In this paper, we present SumUp, a Sybilresilient vote aggregation system that leverages the trust network among users to defend against Sybil attacks. SumUp ...

Real-time crowdsourced maps such as Waze provide timely updates on traffic, congestion, accidents and points of interest. In this paper, we demonstrate how lack of strong location authentication allows creation of software-based Sybil devices that expose crowdsourced map systems to a variety of security and privacy attacks. Our experiments show that a single Sybil device with limited resources ...