?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PrivEx%3A+Private+collection+of+traffic+statistics+for+anonymous+communication+networks&rft.creator=Elahi%2C+T&rft.creator=Goldberg%2C+I&rft.creator=Danezis%2C+G&rft.description=In+addition+to+their+common+use+for+private+online+communication%2C+anonymous+communication+networks+can+also+be+used+to+circumvent+censorship.+However%2C+it+is+difficult+to+determine+the+extent+to+which+they+are+actually+used+for+this+purpose+without+violating+the+privacy+of+the+networks'+users.+Knowing+this+extent+can+be+useful+to+designers+and+researchers+who+would+like+to+improve+the+performance+and+privacy+properties+of+the+network.+To+address+this+issue%2C+we+propose+a+statistical+data+collection+system%2C+PrivEx%2C+for+collecting+egress+traffic+statistics+from+anonymous+communication+networks+in+a+secure+and+privacy-preserving+manner.+Our+solution+is+based+on+distributed+differential+privacy+and+secure+multiparty+computation%3B+it+preserves+the+security+and+privacy+properties+of+anonymous+communication+networks%2C+even+in+the+face+of+adversaries+that+can+compromise+data+collection+nodes+or+coerce+operators+to+reveal+cryptographic+secrets+and+keys.+Copyright+is+held+by+the+owner%2Fauthor(s).&rft.publisher=ACM&rft.contributor=Dimitrakakis%2C+C&rft.date=2014-11-03&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A+Dimitrakakis%2C+C%2C+(ed.)+Proceedings+of+the+2014+ACM+SIGSAC+Conference+on+Computer+and+Communications+Security.++(pp.+1068+-+1079).++ACM%3A+New+York%2C+US.+(2014)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1463996%2F1%2FElahi%2520et%2520al.%2520PrivEx%2520.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1463996%2F&rft.rights=open