Peer profile based trust model for P2P systems using genetic algorithm |
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Authors: | Chithra Selvaraj Sheila Anand |
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Affiliation: | (1) Department of Information Technology, SSN College of Engineering, Rajiv Gandhi Salai (OMR), Anna University, Chennai, Tamil Nadu, India;(2) Department of Computer Studies, Rajalakshmi Engineering College, Anna University, Chennai, Tamil Nadu, India |
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Abstract: | The open and anonymous nature of P2P allows peers to easily share their data and other resources among multiple peers, but
the absence of a defensible border raise serious security concerns for the users. There is a lack of accountability for the
content that is shared by peers and it is hard to distinguish malicious users from honest peers. Establishing Trust relationship
between peers can serve as the metric to determine the veracity of the shared content and reliability of the peers. Most of
the research work in this area is on Reputation based trust management where trust is determined on the basis of recommendation
of other peers. Such recommendations are subjective and can be biased. A number of peers can also collude to provide false
testimony for malicious peers. This paper proposes a novel Trust model that combines peer profiling with anomaly detection
technique. Each peer can establish trust based on its own prior activities with other peers by comparing the current activity
of a peer with its historical data and Genetic Algorithm (GA) has been employed to detect the anomalous behavior. Peer profile
is updated dynamically with every transaction using GA operator’s crossover and mutation. This model has been tested using
a file sharing application against common attacks and the results obtained are compared with statistical anomaly detection
approach. |
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Keywords: | |
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