{"id":153110,"date":"2007-06-01T00:00:00","date_gmt":"2007-06-01T00:00:00","guid":{"rendered":"https:\/\/cm-edgetun.pages.dev\/en-us\/research\/msr-research-item\/leveraging-altruism-in-cooperative-services\/"},"modified":"2018-10-16T20:51:04","modified_gmt":"2018-10-17T03:51:04","slug":"leveraging-altruism-in-cooperative-services","status":"publish","type":"msr-research-item","link":"https:\/\/cm-edgetun.pages.dev\/en-us\/research\/publication\/leveraging-altruism-in-cooperative-services\/","title":{"rendered":"Leveraging Altruism in Cooperative Services"},"content":{"rendered":"<div class=\"asset-content\">\n<p>When there is no central administrator to control the actions of nodes in a distributed system, the users may deviate for personal gain. The BAR model describes the three types of nodes in these environments: Byzantine nodes deviate arbitrarily, Altruistic nodes follow the protocol, and Rational nodes deviate for gain. Previous attempts at writing BAR-Tolerant protocols have relied on a form of policing that makes sure that all non-Byzantine nodes follow the same protocol. This method makes it impossible to take advantage of the Altruistic nodes. In this paper we introduce a new equilibrium concept that does not rely on such strong policing. As a result, we can leverage Altruistic nodes when they are present. We give a condition that is sufficient to ensure that protocol guarantees hold despite Rational and Byzantine nodes, and we show how to use the new equilibrium concept and condition to build a BAR-Tolerant Terminating Reliable Broadcast protocol. Our protocol leverages Altruistic nodes to reduce the amount of extra work that Byzantine nodes can inflict on the system.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When there is no central administrator to control the actions of nodes in a distributed system, the users may deviate for personal gain. The BAR model describes the three types of nodes in these environments: Byzantine nodes deviate arbitrarily, Altruistic nodes follow the protocol, and Rational nodes deviate for gain. Previous attempts at writing BAR-Tolerant [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":[{"type":"user_nicename","value":"jpmartin","user_id":"32417"}],"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"MSR-TR-2007-76","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"","msr_doi":"","msr_arxiv_id":"","msr_s2_paper_id":"","msr_mag_id":"","msr_pubmed_id":"","msr_other_authors":"","msr_other_contributors":"","msr_speaker":"","msr_award":"","msr_affiliation":"","msr_institution":"Microsoft 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