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- W2037242246 abstract "Popular reputation systems for linked networks can be manipulated by spammers who strategically place links. The reputation of node v is interpreted as the world’s opinion of v’s importance. In PageRank [4], v’s own opinion can be seen to have considerable influence on her reputation, where v expresses a high opinion of herself by participating in short directed cycles. In contrast, we show that expected hitting time — the time to reach v in a random walk — measures essentially the same quantity as PageRank, but excludes v’s opinion. We make these notions precise, and show that a reputation system based on hitting time resists tampering by individuals or groups who strategically place outlinks. We also present an algorithm to efficiently compute hitting time for all nodes in a massive graph; conventional algorithms do not scale adequately." @default.
- W2037242246 created "2016-06-24" @default.
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- W2037242246 date "2007-11-14" @default.
- W2037242246 modified "2023-09-26" @default.
- W2037242246 title "Manipulation-Resistant Reputations Using Hitting Time" @default.
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- W2037242246 doi "https://doi.org/10.1007/978-3-540-77004-6_6" @default.
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