(19)

(11)

EP 4 133 695 A1

(12)

(43) Date of publication: 15.02.2023 Bulletin 2023/07 (21) Application number: 21785519.6 (22) Date of filing: 06.04.2021

(51) International Patent Classification (IPC):  H04L 12/28(1990.01) H04L 29/08(1990.01) H04L 12/66(1990.01) G06N 3/08(2000.01) (52) Cooperative Patent Classification (CPC): H04L 12/2814; H04L 69/18; H04L 69/08; H04L 67/125; G06N 20/00; H04L 67/565 (86) International application number: PCT/US2021/025943 (87) International publication number: WO 2021/207179 (14.10.2021 Gazette 2021/41)

(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: 06.04.2020 US 202016840648 06.04.2020 US 202016840708 (71) Applicant: Computime Ltd. Hong Kong (HK)	(72) Inventors: CHOI, Hung Bun Hong Kong Science Park, Shatin New Territories (HK) PANG TSANG, Gideon Sui Hong Kong Science Park, Shatin New Territories (HK) CHU, Chun Kit Hong Kong Science Park, Shatin New Territories (HK) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)