We describe the design, implementation, and evaluation of Popcorn, a media delivery system that hides clients\u2019 consumption (even from the content distributor). Popcorn relies on a powerful cryptographic primitive: private information retrieval (PIR). With novel refinements that leverage the properties of PIR protocols and media streaming, Popcorn scales to the size of Netflix\u2019s library (8000 movies) and respects current controls on media dissemination. The dollar cost to serve a media object in Popcorn is 3.87\u0002 that of a non-private system.<\/p>\n","protected":false},"excerpt":{"rendered":"
We describe the design, implementation, and evaluation of Popcorn, a media delivery system that hides clients\u2019 consumption (even from the content distributor). Popcorn relies on a powerful cryptographic primitive: private information retrieval (PIR). With novel refinements that leverage the properties of PIR protocols and media streaming, Popcorn scales to the size of Netflix\u2019s library (8000 […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"USENIX Symposium on Networked Systems Design and Implementation (NSDI)","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"USENIX Symposium on Networked Systems Design and Implementation 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