Sharing personal content online is surprisingly hard despite the recent emergence of a huge number of content sharing systems and sites. These systems suffer from several drawbacks: they each have a different way of providing access control which cannot be used with other systems; moving to a new system is a lengthy process and requires registration and invitation of all one\u2019s friends to the new system; and the rules for access control are complicated and become more so as our networks of online friends grow. In this paper, we present Lockr \u2013 an access control scheme based on social relationships that makes sharing personal content easy. Lockr separates social networking information from the content sharing mechanisms, thereby eliminating the need for users to maintain many site-speci\ufb01c copies of their social networks. We describe Lockr\u2019s design, security properties, and limitations. We also present how we integrated Lockrwith two popular systems for sharing content online \u2013 BitTorrent and Flickr.<\/p>\n","protected":false},"excerpt":{"rendered":"
Sharing personal content online is surprisingly hard despite the recent emergence of a huge number of content sharing systems and sites. These systems suffer from several drawbacks: they each have a different way of providing access control which cannot be used with other systems; moving to a new system is a lengthy process and requires […]<\/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":"","footnotes":""},"msr-content-type":[3],"msr-research-highlight":[],"research-area":[13547],"msr-publication-type":[193716],"msr-product-type":[],"msr-focus-area":[],"msr-platform":[],"msr-download-source":[],"msr-locale":[268875],"msr-post-option":[],"msr-field-of-study":[],"msr-conference":[],"msr-journal":[],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-160038","msr-research-item","type-msr-research-item","status-publish","hentry","msr-research-area-systems-and-networking","msr-locale-en_us"],"msr_publishername":"","msr_edition":"Proceedings of the First ACM SIGCOMM Workshop on Online Social Networks (WOSN)","msr_affiliation":"","msr_published_date":"2008-08-01","msr_host":"","msr_duration":"","msr_version":"","msr_speaker":"","msr_other_contributors":"","msr_booktitle":"","msr_pages_string":"","msr_chapter":"","msr_isbn":"","msr_journal":"","msr_volume":"","msr_number":"","msr_editors":"","msr_series":"","msr_issue":"","msr_organization":"","msr_how_published":"","msr_notes":"","msr_highlight_text":"","msr_release_tracker_id":"","msr_original_fields_of_study":"","msr_download_urls":"","msr_external_url":"","msr_secondary_video_url":"","msr_longbiography":"","msr_microsoftintellectualproperty":1,"msr_main_download":"208122","msr_publicationurl":"","msr_doi":"","msr_publication_uploader":[{"type":"file","title":"lockr.pdf","viewUrl":"https:\/\/www.microsoft.com\/en-us\/research\/wp-content\/uploads\/2016\/02\/lockr-1.pdf","id":208122,"label_id":0}],"msr_related_uploader":"","msr_attachments":[{"id":208122,"url":"https:\/\/www.microsoft.com\/en-us\/research\/wp-content\/uploads\/2016\/02\/lockr-1.pdf"}],"msr-author-ordering":[{"type":"text","value":"Amin Tootoonchian","user_id":0,"rest_url":false},{"type":"text","value":"Kiran K. Gollu","user_id":0,"rest_url":false},{"type":"user_nicename","value":"ssaroiu","user_id":33716,"rest_url":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/microsoft-research\/v1\/researchers?person=ssaroiu"},{"type":"text","value":"Yashar Ganjali","user_id":0,"rest_url":false},{"type":"user_nicename","value":"alecw","user_id":30925,"rest_url":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/microsoft-research\/v1\/researchers?person=alecw"}],"msr_impact_theme":[],"msr_research_lab":[],"msr_event":[],"msr_group":[144899],"msr_project":[170531],"publication":[],"video":[],"download":[],"msr_publication_type":"inproceedings","related_content":{"projects":[{"ID":170531,"post_title":"Lockr: Better Privacy for Social Networks","post_name":"lockr-better-privacy-for-social-networks","post_type":"msr-project","post_date":"2010-08-17 16:26:44","post_modified":"2017-06-19 14:21:17","post_status":"publish","permalink":"https:\/\/www.microsoft.com\/en-us\/research\/project\/lockr-better-privacy-for-social-networks\/","post_excerpt":"Today\u2019s online social networking (OSN) sites do little to protect the privacy of their users\u2019 social networking information. Given the highly sensitive nature of the information these sites store, it is understandable that many users feel victimized and disempowered by OSN providers\u2019 terms of service. Lockr is\u00a0a system that improves the privacy of centralized and decentralized online content sharing systems. Lockr offers three significant privacy benefits to OSN users. 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