Visible to the public An Open Privacy-Preserving and Scalable Protocol for a Network-Neutrality Compliant Caching

TitleAn Open Privacy-Preserving and Scalable Protocol for a Network-Neutrality Compliant Caching
Publication TypeConference Paper
Year of Publication2019
AuthorsAndreoletti, Davide, Rottondi, Cristina, Giordano, Silvia, Verticale, Giacomo, Tornatore, Massimo
Conference NameICC 2019 - 2019 IEEE International Conference on Communications (ICC)
Date Publishedmay
Keywordscache storage, content providers, CP, cps privacy, cyber physical systems, Detectors, Feeds, Geometry, Human Behavior, human factors, Impedance, Internet, Internet service providers, ISP network, Layout, network-neutrality compliant caching, open privacy-preserving scalable protocol, privacy, Protocols, pubcrawl, QoS, quality of service, RA, regulator authority, Shamir Secret Sharing scheme, Silicon, SSS scheme, telecommunication traffic, traffic prioritization, video content distribution
AbstractThe distribution of video contents generated by Content Providers (CPs) significantly contributes to increase the congestion within the networks of Internet Service Providers (ISPs). To alleviate this problem, CPs can serve a portion of their catalogues to the end users directly from servers (i.e., the caches) located inside the ISP network. Users served from caches perceive an increased QoS (e.g., average retrieval latency is reduced) and, for this reason, caching can be considered a form of traffic prioritization. Hence, since the storage of caches is limited, its subdivision among several CPs may lead to discrimination. A static subdivision that assignes to each CP the same portion of storage is a neutral but ineffective appraoch, because it does not consider the different popularities of the CPs' contents. A more effective strategy consists in dividing the cache among the CPs proportionally to the popularity of their contents. However, CPs consider this information sensitive and are reluctant to disclose it. In this work, we propose a protocol based on Shamir Secret Sharing (SSS) scheme that allows the ISP to calculate the portion of cache storage that a CP is entitled to receive while guaranteeing network neutrality and resource efficiency, but without violating its privacy. The protocol is executed by the ISP, the CPs and a Regulator Authority (RA) that guarantees the actual enforcement of a fair subdivision of the cache storage and the preservation of privacy. We perform extensive simulations and prove that our approach leads to higher hit-rates (i.e., percentage of requests served by the cache) with respect to the static one. The advantages are particularly significant when the cache storage is limited.
DOI10.1109/ICC.2019.8761596
Citation Keyandreoletti_open_2019