(19)

(11)

EP 4 515 815 A1

(12)

(43) Date of publication: 05.03.2025 Bulletin 2025/10 (21) Application number: 23709018.8 (22) Date of filing: 09.02.2023

(51) International Patent Classification (IPC):  H04L 9/40(2022.01) H04L 67/56(2022.01) H04L 65/1069(2022.01) H04L 67/10(2022.01) H04L 65/1104(2022.01) H04L 67/1001(2022.01) (52) Cooperative Patent Classification (CPC): H04L 67/56; H04L 65/1104; H04L 65/1069; H04L 67/1001; H04L 63/20; H04L 63/166; H04L 63/0823; H04L 63/0281; H04L 63/0869; H04L 67/565 (86) International application number: PCT/US2023/012747 (87) International publication number: WO 2023/211540 (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 202206157 28.06.2022 US 202217852317 (71) Applicant: Microsoft Technology Licensing, LLC Redmond, WA 98052-6399 (US)	(72) Inventors: HOCKEY, Alex John Redmond, Washington 98052-6399 (US) THEBRIDGE, Mark Lawrence 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)