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2PPS – Publish/Subscribe with Provable Privacy

Abdelwahab Gaballah, Sarah; Coijanovic, Christoph; Strufe, Thorsten; Mühlhäuser, Max

Abstract (englisch):

Publish/Subscribe systems like Twitter and Reddit let users communicate with many recipients without requiring prior personal connections. The content that participants of these systems publish and subscribe to is typically public, but they may nevertheless wish to remain anonymous. While many existing systems allow users to omit explicit identifiers, they do not address the obvious privacy risks of being associated with content that may contain a wide range of sensitive information. We present 2PPS (Twice-Private Publish-Subscribe), the first pub/sub protocol to deliver strong provable privacy protection for both publishers and subscribers, leveraging Distributed Point Function-based secret sharing for publishing and Private Information Retrieval for subscribing. 2PPS does not require trust in other clients and its privacy guarantees hold as long as even a single honest server participant remains. Furthermore, it is scalable and delivers latency suitable for microblogging applications. A prototype implementation of 2PPS can handle 100,000 concurrent active clients with 5 seconds end-to-end latency and significantly lower bandwidth requirements than comparable systems.

DOI: 10.1109/SRDS53918.2021.00028
Zitationen: 1
Zugehörige Institution(en) am KIT Institut für Telematik (TM)
Kompetenzzentrum für angewandte Sicherheitstechnologie (KASTEL)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2021
Sprache Englisch
Identifikator ISBN: 978-1-6654-3820-9
KITopen-ID: 1000140298
HGF-Programm 46.23.01 (POF IV, LK 01) Methods for Engineering Secure Systems
Erschienen in 40th International Symposium on Reliable Distributed Systems (SRDS), Chicago, IL, USA, 20-23 Sept. 2021. Vol.: 1
Veranstaltung 40. IEEE International Symposium on Reliable Distributed Systems (SRDS 2021), Chicago, IL, USA, 20.09.2021 – 23.09.2021
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Seiten 198-209
Schlagwörter privacy, anonymity, publish, subscribe, social media, messenger
Nachgewiesen in arXiv
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