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Our research looks particularly at assigning trust in Web-based social networks and investigates how trust information can be mined and integrated into applications. This article introduces a definition of trust suitable for use in Web-based social networks with a discussion of the properties that will influence its use in computation. We then present two algorithms for inferring trust relationships between individuals that are not directly connected in the network. Both algorithms are shown theoretically and through simulation to produce calculated trust values that are highly accurate.. We then present TrustMail, a prototype email client that uses variations on these algorithms to score email messages in the user's inbox based on the user's participation and ratings in a trust network.<\/jats:p>","DOI":"10.1145\/1183463.1183470","type":"journal-article","created":{"date-parts":[[2007,1,16]],"date-time":"2007-01-16T19:38:29Z","timestamp":1168976309000},"page":"497-529","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":327,"title":["Inferring binary trust relationships in Web-based social networks"],"prefix":"10.1145","volume":"6","author":[{"given":"Jennifer","family":"Golbeck","sequence":"first","affiliation":[{"name":"University of Maryland, College Park, MD"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James","family":"Hendler","sequence":"additional","affiliation":[{"name":"University of Maryland, College Park, MD"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2006,11]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.5555\/820262.820322"},{"key":"e_1_2_1_2_1","volume-title":"Proceedings of the 1st Workshop on Friend of a Friend, Social Networking and the (Semantic) Web","author":"Avesani P.","unstructured":"Avesani , P. , Massa , P. , and Tiella , R . 2004. Moleskiing: a Trust-aware decentralized recommender system . In Proceedings of the 1st Workshop on Friend of a Friend, Social Networking and the (Semantic) Web . Galway, Ireland.]] Avesani, P., Massa, P., and Tiella, R. 2004. Moleskiing: a Trust-aware decentralized recommender system. In Proceedings of the 1st Workshop on Friend of a Friend, Social Networking and the (Semantic) Web. Galway, Ireland.]]"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/371920.372071"},{"key":"e_1_2_1_4_1","doi-asserted-by":"crossref","unstructured":"looseness-1Barber K. S. and Kim J. 2000. Belief revision process based on trust: Agents evaluating reputation of information sources. Lecture Notes In Computer Science; vol. 2246 73--82.]]   looseness-1Barber K. S. and Kim J. 2000. Belief revision process based on trust: Agents evaluating reputation of information sources. Lecture Notes In Computer Science; vol. 2246 73--82.]]","DOI":"10.1007\/3-540-45547-7_5"},{"key":"e_1_2_1_5_1","volume-title":"Proceedings of ESORICS 94 (Nov.) Brighton, UK.]]","author":"Beth T.","unstructured":"Beth , T. , Borcherding , M. , and Klein , B . 1994. Valuation of trust in open networks . In Proceedings of ESORICS 94 (Nov.) Brighton, UK.]] Beth, T., Borcherding, M., and Klein, B. 1994. Valuation of trust in open networks. In Proceedings of ESORICS 94 (Nov.) Brighton, UK.]]"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/362686.362692"},{"key":"e_1_2_1_7_1","unstructured":"Boykin P. O. and Roychowdhury V. 2004. Personal email networks: an effective anti-spam tool. http:\/\/www.arxiv.org\/abs\/cond-mat\/0402143.]]  Boykin P. O. and Roychowdhury V. 2004. 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