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Download POP-SNAQ: Privacy-preserving Open Platform for Social
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POP-SNAQ: Privacy-preserving Open Platform for Social Network Application Queries Brian Thompson Huijun Xiong Online Social Networks • Use of OSNs continues to increase Online Social Networks • To accommodate growing needs, a greater variety of OSNs has appeared Motivation • Need a way to collect info from many different OSNs and provide it to the user in a clean and organized fashion Must also be careful not to compromise users’ privacy! Brian and Huijun at the Concert Motivation • Current Solution: many individual queries Face My iLike Space book “Where is my friend Huijun?” Motivation • Our Proposed Solution: cross-network query QUERY ALL “Where is my friend Huijun?” POP-SNAQ Privacy-preserving Open Platform for Social Network Application Queries • provides a unified framework that supports cross-network queries • uses a common language • employs security measures to protect users’ privacy POP-SNAQ Privacy-preserving Open Platform for Social Network Application Queries • provides a unified framework that supports cross-network queries • uses a common language • employs security measures to protect users’ privacy POP-SNAQ System architecture POP-SNAQ Privacy-preserving Open Platform for Social Network Application Queries • provides a unified framework that supports cross-network queries • uses a common language • employs security measures to protect users’ privacy POP-SNAQ • OpenSocial – By Google – A common API for social network apps – “Develop once, Use Everywhere” – Supported by >20 social networks POP-SNAQ Privacy-preserving Open Platform for Social Network Application Queries • provides a unified framework that supports cross-network queries • uses a common language • employs security measures to protect users’ privacy POP-SNAQ Communication Model POP-SNAQ • server-side app means OSNs have control over release of data – filter data before releasing – limit output to public profile info – “Free Input, Selective Output” • two kinds of filtering 1) based on user preferences 2) based on social network preferences POP-SNAQ • text-to-image conversion – performed server-side – built into communication protocol • open source implementations already available – GD library imagettftext() • protects against large-scale data harvesting attacks Analysis of POP-SNAQ • To evaluate our project, we compare it with an existing system: Facebook Connect Facebook Connect • similar platform to Facebook Apps • allows information sharing between Facebook and external websites • enables external websites to access Facebook’s user database • potential websites must first be reviewed and approved by Facebook THE BATTLE Facebook Connect POP-SNAQ BATTLE 1: Utility Facebook Connect POP-SNAQ • direct access to user database • access all public profile info • two-way communication • single-network solution • filtered access to user database • apps can use private info too! • one-way communication • cross-network solution TIE! BATTLE 2: Openness Facebook Connect POP-SNAQ • approve apps after careful inspection • look into every submission. . . eventually • applications are automatically approved • accept every submission immediately POP-SNAQ WINS! BATTLE 3: Privacy Facebook Connect • privacy enforced by policies • manually check for data abuse • external website controls data flow to users POP-SNAQ • privacy enforced by technology • built-in protection against abuse • social networks control data flow to users POP-SNAQ WINS! VICTORY: POP-SNAQ! Facebook Connect POP-SNAQ VICTORY: POP-SNAQ! Sounds great! But can it be true? Is POP-SNAQ just a dream, or can it be reality? Simulation Hold on to your seats! Conclusions • POP-SNAQ is a solution to the problem of performing cross-network queries • Achieves a balance between providing utility and protecting users’ privacy • Improves on existing solution of Facebook Connect • Future work: Requires implementation of extended OpenSocial API Questions?
