(19)

(11)

EP 3 973 428 A1

(12)

(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 19779894.5 (22) Date of filing: 30.09.2019

(51) International Patent Classification (IPC):  G06F 21/57(2013.01) G06F 21/53(2013.01) G06F 21/50(2013.01) H04L 29/06(2006.01) (52) Cooperative Patent Classification (CPC): G06F 21/572; G06F 21/53; G06F 21/64; H04L 63/126; H04L 2463/062; H04L 63/0442; H04L 63/0435 (86) International application number: PCT/EP2019/076479 (87) International publication number: WO 2021/063484 (08.04.2021 Gazette 2021/14)

(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 (71) Applicant: Huawei Cloud Computing Technologies Co., Ltd. Guizhou 550025 (CN)	(72) Inventors: WANG, Feng 80992 Munich (DE) TOUITOU, Dan 80992 Munich (DE) BARON, Ayal 80992 Munich (DE) (74) Representative: Thun, Clemens  Mitscherlich PartmbB Patent- und Rechtsanwälte Sonnenstraße 33 80331 München 80331 München (DE)