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The Mason Test: A Defense Against Sybil Attacks in Wireless Networks Without Trusted Authorities
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The Mason Test: A Defense Against Sybil Attacks in Wireless Networks Without Trusted Authorities

Category : Mobile Computing


Sub Category : DOTNET


Project Code : ITDMC02


Project Abstract

THE MASON TEST: A DEFENSE AGAINST SYBIL ATTACKS IN WIRELESS NETWORKS WITHOUT TRUSTED AUTHORITIES

ABSTRACT

 

            Wireless networks are vulnerable to Sybil attacks, in which a malicious node poses as many identities in order to gain disproportionate influence. Many defenses based on spatial variability of wireless channels exist, but depend either on detailed, multi-tap channel estimation something not exposed on commodity 802.11 devices or valid RSSI observations from multiple trusted sources, e.g., corporate access points something not directly available in ad hoc and delay-tolerant networks with potentially malicious neighbors. We extend these techniques to be practical for wireless ad hoc networks of commodity 802.11 devices. Specifically, we propose two efficient methods for separating the valid RSSI observations of behaving nodes from those falsified by malicious participants. Further, we Note that prior signalprint methods are easily defeated by mobile attackers and develop an appropriate challenge-response defense. Finally, we present the Mason test, the first implementation of these techniques for ad hoc and delay-tolerant networks of commodity 802.11 devices. We illustrate its performance in several real-world scenarios.

EXISTING SYSTEM

PROPOSED SYSTEM

EXISTING CONCEPT:-

In this  existing case observations falsified by attackers can lead to incorrect conclusions  Trust-less methods have been proposed, but have various limitations (e.g., devices must have uniform transmit power or the method may be used only in outdoor environments with predictable propagation ranges) . 

 

PROPOSED CONCEPT:-

We extend these techniques to be practical for wireless ad hoc networks of commodity 802.11 devices. Specifically, we propose two efficient methods for separating the valid RSSI observations of behaving nodes from those falsified by malicious participants.

 

EXISTING TECHNIQUE:-

Trust less method

PROPOSED TECHNIQUE:-

Signalprint-based Method

TECHNIQUE DEFNITION:-

 

Bouassida et al. developed a trust-less method for vehicular area networks. Instead of relying on external measurements, the verifier obtains uncorrelated measurements by changing its own reception locations.

These measurements are used to locate the transmitter and detect abnormalities.

TECHNIQUE DEFNITION:-

 

Signalprint-based detection is easily defeated by nodes that change locations to produce multiple signal prints. Most past work ignores this problem, assuming that all nodes, including attackers, remain stationary.

Although reasonable for conforming nodes, e.g., most human carried smart phones are stationary over short time-spans this is too strong an assumption for attackers.

DRAWBACKS:-

It must have uniform transmit power.

Data should carefully maintain.

ADVANTAGES:-

This technique is very efficient if there is heavy interaction between branches.

We can store the data normally and efficiently.

 

 
 
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