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(11)

EP 4 292 004 A1

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(43) Date of publication: 20.12.2023 Bulletin 2023/51 (21) Application number: 22707544.7 (22) Date of filing: 07.02.2022

(51) International Patent Classification (IPC):  G06F 21/62(2013.01) H04L 9/40(2022.01) (52) Cooperative Patent Classification (CPC): G06F 21/6272; H04L 67/1095; H04L 67/10; H04L 63/10; G06F 21/6218; H04L 67/306 (86) International application number: PCT/US2022/015421 (87) International publication number: WO 2023/277962 (05.01.2023 Gazette 2023/01)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 28.06.2021 US 202117360400 28.06.2021 US 202117360542 28.06.2021 US 202117360549 28.06.2021 US 202117360556 (71) Applicant: Dropbox, Inc. San Francisco, CA 94158 (US)

(72) Inventors: PASSEY, Aaron San Francisco, California 94158 (US) WANG, Fangzhou San Francisco, California 94158 (US) CUNNINGHAM, Eric San Francisco, California 94158 (US) AUSBURN, Royce San Francisco, California 94158 (US) LARSON, Nicholas San Francisco, California 94158 (US) WETTERAU, David San Francisco, California 94158 (US) HO, William San Francisco, California 94158 (US) HO, Harrison San Francisco, California 94158 (US) (74) Representative: St Clair Jones, Gregory Arthur Langley et al Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)