{"type":"ScholarlyArticle","title":"Trust Mechanisms for Online Systems (Extended Abstract)","authors":[{"name":"Jens Witkowski","slug":"jens-witkowski","given":"Jens","family":"Witkowski","affiliation":""}],"abstract":"The most prominent way to establish trust in online markets such as eBay are reputation systems that publish buyer feedback about a seller's past behavior. These systems, however, critically rely on assumptions that are rarely met in real-world marketplaces: first, it is assumed that there are no reporting costs and no benefits from lying so that buyers honestly report their private experiences. Second, it is assumed that every seller is long-lived, i.e. will continue to trade on the marketplace indefinitely and, third, it is assumed that sellers cannot whitewash, i.e. create new accounts once an old one is ran down. In my thesis, I address all of these assumptions and design incentive-compatible trust mechanisms that do not rely on any of the aforementioned assumptions. Moreover, I focus on designs that minimize common knowledge assumptions with respect to the players' valuations, costs and beliefs.","doi":"10.5591/978-1-57735-516-8/IJCAI11-505","url":"https://ijcai.org/proceedings/2011/505","pdf":"https://ijcai.org/proceedings/2011/0505.pdf","markdown":"https://ijcai.org/proceedings/2011/505.md","bibtex":"https://ijcai.org/proceedings/2011/bibtex/505","volume":{"slug":"2011","title":"Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2011","url":"https://ijcai.org/proceedings/2011/","year":2011,"location":"Barcelona, Catalonia, Spain","dates":"16–22 July 2011","editors":"Toby Walsh","isbn":"978-1-57735-512-0; 978-1-57735-513-7; 978-1-57735-514-4; 978-1-57735-515-1; 978-1-57735-516-8","publisher":"AAAI Press/International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":null,"track":"","number":505,"pages":{"first":2866,"last":2866},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}