Can You Trust Your Encrypted Cloud?: An Assessment of SpiderOakONE's Security

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This paper presents an independent security review of a popular encrypted cloud storage service (ECS) SpiderOakONE. Contrary to previous work analyzing similar programs, we formally define a minimal security requirements for confidentiality in ECS which takes into account the possibility that the ECS actively turns against its users in an attempt to break the confidentiality of the users' data. Our analysis uncovered several serious issues, which either directly or indirectly damage the confidentiality of a user's files, therefore breaking the claimed Zero- or No-Knowledge property (i.e., the claim that even the ECS itself cannot access the users' data). After responsibly disclosing the issues we found to SpiderOak, most have been fixed.

Original languageEnglish
Title of host publicationASIACCS 2018 - Proceedings of the 2018 ACM Asia Conference on Computer and Communications Security
EditorsJong Kim, Gail-Joon Ahn, Seungjoo Kim
Number of pages13
Place of publicationNew York, NY, USA
PublisherAssociation for Computing Machinery
Publication year29 May 2018
ISBN (print)978-1-4503-5576-6
ISBN (Electronic)9781450355766
Publication statusPublished - 29 May 2018
EventACM Asia Conference on Computer & Communications Security 2018 - Songdo Central Park Hotel, Songdo, Korea, Republic of
Duration: 4 Jun 20188 Jun 2018
Conference number: 13


ConferenceACM Asia Conference on Computer & Communications Security 2018
LocationSongdo Central Park Hotel
LandKorea, Republic of
SeriesASIACCS '18

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