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Chapter Nine - EigenTrust > 9.3 Eigentrust

9.3 EIGENTRUST

In this section, we describe the EigenTrust algorithm. In EigenTrust, the global reputation of each peer i is given by the local trust values assigned to peer i by other peers, weighted by the global reputations of the assigning peers. In Section 9.3.1, we show how to normalize the local trust values in a manner that leads to an elegant probabilistic interpretation and an efficient algorithm for aggregating these values. In Section 9.3.2, we discuss how to aggregate the normalized trust values in a sensible manner. In Section 9.3.3, we discuss the probabilistic interpretation of the local and global trust values. In Sections 9.3.4–9.3.6, we present an algorithm for computing the global trust values.

9.3.1 Normalizing Local Trust Values


  

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