(19)

(11)

EP 4 515 816 A1

(12)

(43) Date of publication: 05.03.2025 Bulletin 2025/10 (21) Application number: 23711289.1 (22) Date of filing: 18.02.2023

(51) International Patent Classification (IPC):  H04L 9/40(2022.01) H04L 67/10(2022.01) G06F 11/30(2006.01) (52) Cooperative Patent Classification (CPC): H04L 63/0428; H04L 67/10; G06F 11/3006; H04L 67/51; H04L 43/00; H04L 67/02; H04L 67/563; H04L 41/5051; H04L 41/5058; H04L 43/20; H04L 41/122 (86) International application number: PCT/US2023/013367 (87) International publication number: WO 2023/211551 (02.11.2023 Gazette 2023/44)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 28.04.2022 GB 202206159 16.06.2022 US 202217841909 (71) Applicant: Microsoft Technology Licensing, LLC Redmond, WA 98052-6399 (US)	(72) Inventors: TURNER, James Warren Redmond, Washington 98052-6399 (US) PATERSON, Christopher James Redmond, Washington 98052-6399 (US) HOCKEY, Alex John Redmond, Washington 98052-6399 (US) (74) Representative: CMS Cameron McKenna Nabarro Olswang LLP  Cannon Place 78 Cannon Street London EC4N 6AF London EC4N 6AF (GB)