Anonymous communication with on-line and off-line onion encoding PDF
Preview Anonymous communication with on-line and off-line onion encoding
Introduction Newapproach Conclusions Anonymous communication with on-line and off-line onion encoding MarekKlonowski,MirosławKutyłowski,FilipZagórski WrocławUniversityofTechnology, SOFSEM’2005 PartiallysupportedbytheEUwithinthe6thFrameworkProgrammeundercontract001907(DELIS) MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Privacy in Communication Systems I messagescanbekeptsecret I reliableauthentication I howtohidethattwopartiesarecommunicating?? MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Need of Anonymity in Communication I ahealthinsurancecompanydiscoversthatanapplicant hassoughtinformationonspecificheartdiseases–his applicationgetrejected! I buyingaproduct–thesellerknowswhereIhavechecked theprices. –thegamebecomesunfair! MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding I scalability I layeredapproachconsistentwithcommunicationsystems architecture I adaptivenesstonetworkload I theend-usermachinehaslimitedknowledgeofthenetwork I resistanceagainstdynamicattacks(notonlyobservingthe networkbutalsoinserting/deletingmessages) Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Design Goals I provablesecurity MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding I adaptivenesstonetworkload I theend-usermachinehaslimitedknowledgeofthenetwork I resistanceagainstdynamicattacks(notonlyobservingthe networkbutalsoinserting/deletingmessages) Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Design Goals I provablesecurity I scalability I layeredapproachconsistentwithcommunicationsystems architecture MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding I resistanceagainstdynamicattacks(notonlyobservingthe networkbutalsoinserting/deletingmessages) Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Design Goals I provablesecurity I scalability I layeredapproachconsistentwithcommunicationsystems architecture I adaptivenesstonetworkload I theend-usermachinehaslimitedknowledgeofthenetwork MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Design Goals I provablesecurity I scalability I layeredapproachconsistentwithcommunicationsystems architecture I adaptivenesstonetworkload I theend-usermachinehaslimitedknowledgeofthenetwork I resistanceagainstdynamicattacks(notonlyobservingthe networkbutalsoinserting/deletingmessages) MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding I tokenring: encodedmessagesgoaroundthering communicationdelay! Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Naive or Local Network Solutions I all-to-all: sendtheencryptedmessagetoallparticipants, communicationoverhead! MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Naive or Local Network Solutions I all-to-all: sendtheencryptedmessagetoallparticipants, communicationoverhead! I tokenring: encodedmessagesgoaroundthering communicationdelay! MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding Introduction Anonymity Newapproach ExistingSolutions Conclusions Existingproblems Onion Encoding m MarekKlonowski,MirosławKutyłowski,FilipZagórski Anonymouscommunicationwithon-lineandoff-lineonionencoding
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