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The work explains how privacy can be understood as impression management and how relationship information is encoded into social-graph topology. It focuses on topology-based policies in Facebook-style systems, introducing reflective policy assessment to help users evaluate policy consequences. Tool support is discussed to address policy assessment needs and practical issues for users.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/privacy-implications-of-access-control-policies-in-social-networks-dpm-2009/139958/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/privacy-implications-of-access-control-policies-in-social-networks-dpm-2009/139958.png","ImageObject",300,407,{"name":92,"@type":93},"Melati","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-14","2026-08-24",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What problem does the document address in social networks?","Question",{"text":112,"@type":113},"It examines the privacy implications of user-chosen access control policies and how those policies affect what impressions other people form.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is privacy conceptualized in the document?",{"text":117,"@type":113},"Privacy is framed as impression management, controlling which profile items are shown to whom.",{"name":119,"@type":110,"acceptedAnswer":120},"What role do topology-based policies play?",{"text":121,"@type":113},"Relationship information is encoded in the topology of a social-graph, so topology-based access control policies help users control impressions.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},139958,1787565297,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},962085570644,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Visualizing Privacy Implications of Access Control Policies in Social Networks  \nMohd Anwar ∗ , Philip W. L. Fong∗ , Xue-Dong Yang†, Howard  \nHamilton†  \n∗ University of Calgary, Alberta, Canada † University of Regina, Saskatchewan, Canada  \nDPM 2009  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 1 / 31   \nMotivation  \n In social networks, privacy settings allow users to choose access control policies  \nFigure: Privacy Setting in Facebook  \n What are the privacy implications of these policies?  \n How do we help users assess topology-based policies?    \nMohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 2 / 31   \nRelated Work  \n Privacy for Impression Management: Goﬀman 1961, Patil & Kobsa 2003  \n Privacy Preservation Model for Social Networks: Fong, Anwar, & Zhao 2009  \n Generating Social Graph: Chakrabarti et al. 2007  \n Visualization (Social Graph/Security Policies): Freeman 2000, Heer & boyd 2005, Reeder et al. 2008  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 3 / 31   \nOutline  \n Privacy in Social Networks  \n User Speciﬁed Policies in Facebook-style Social Network Systems (FSNS)  \n Topology-based Policies  \n Reﬂective Policy Assessment (RPA)  \n Tool Support for RPA  \n Issues & Discussions  \n Work in Progress  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 4 / 31   \nPrivacy in Social Networks  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 5 / 31   \nWhat is Privacy?  \n Purpose of privacy is impression management  \n◮ Control the impression that other people form  \n Control over what impression one wants to convey to whom  \n◮ What proﬁle items to present to whom?  \n◮ e.g. disclose the sorority photos to only friends, but siteseeing photos to everybody  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 6 / 31   \nPrivacy and Access Control Policies  \n Impression is conveyed according to relationship  \n Relationship can be encoded into the topology of a graph ([e.g. social](e.g. social)[ ](e.g. social)graph)  \n Therefore, topological access control policies help users control impression  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 7 / 31   \nUser Speciﬁed Policies in FSNS  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 8 / 31   \nSearch, Traversal, and Access Policies  \nMohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 9 / 31   \nCommunication Policies  \nTo initiate a communication primitive  \nSearch Policy Traversal Policies  \nof receiver  \nStage I  \nTraverse Social Graph  \nGlobal Name Search  \nCommunication event occurs  \n Mohd Anwar (UofC) Privacy Implications of Access Control Policies DPM 2009 10 / 31","cbCaifmmfI7I4GOK","https://ap.wps.com/l/cbCaifmmfI7I4GOK","pdf",387256,31,"English","# Motivation\n## Privacy implications of access control policies\n# Privacy in Social Networks\n## What is privacy\n## Privacy and access control policies\n# User Specified Policies in FSNS\n## Search, traversal, and access policies\n## Communication policies\n# Topology-based Policies\n## Reflective policy assessment (RPA)\n# Tool Support for RPA\n# Issues & Discussions\n## Work in progress","[{\"question\":\"What problem does the document address in social networks?\",\"answer\":\"It examines the privacy implications of user-chosen access control policies and how those policies affect what impressions other people form.\"},{\"question\":\"How is privacy conceptualized in the document?\",\"answer\":\"Privacy is framed as impression management, controlling which profile items are shown to whom.\"},{\"question\":\"What role do topology-based policies play?\",\"answer\":\"Relationship information is encoded in the topology of a social-graph, so topology-based access control policies help users control impressions.\"}]","Privacy Implications of Access Control Policies in Social Networks - DPM 2009 | PDF",78]