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EP 4 226 572 A1

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(43) Date of publication: 16.08.2023 Bulletin 2023/33 (21) Application number: 21718268.2 (22) Date of filing: 12.03.2021

(51) International Patent Classification (IPC):  H04L 9/32(2006.01) G06F 21/64(2013.01) (52) Cooperative Patent Classification (CPC): G06F 21/10; G06F 21/64; H04L 9/0897; H04L 9/3213; H04L 9/3239; H04L 9/3247; H04L 9/3297; H04L 63/00; H04L 9/50 (86) International application number: PCT/US2021/022213 (87) International publication number: WO 2022/076028 (14.04.2022 Gazette 2022/15)

(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: 08.10.2020 US 202063089517 P 09.10.2020 US 202017067394 23.10.2020 US 202063105070 P (71) Applicant: Intertrust Technologies Corporation Milpitas CA 95035 (US)

(72) Inventor: NAGAO, Yutaka San Jose, California 95134 (US) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)