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EP 3 673 615 A1

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(43) Date of publication: 01.07.2020 Bulletin 2020/27 (21) Application number: 18848520.5 (22) Date of filing: 22.08.2018

(51) International Patent Classification (IPC):  H04L 9/32(2006.01) H04L 29/06(2006.01) H04L 9/08(2006.01) (86) International application number: PCT/US2018/047578 (87) International publication number: WO 2019/040651 (28.02.2019 Gazette 2019/09)

(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: 24.08.2017 US 201715686076 (71) Applicant: T-Central, Inc. Dover, DE 19901 (US)	(72) Inventors: KRAVITZ, David W. San Jose California 95123 (US) GRAHAM, Donald Houston Los Angeles California 90027 (US) BOUDETT, Josselyn L. Clearwater Florida 33755 (US) DIETZ, Russell S. San Ramon California 94583 (US) STACY, Kent William Delaware 19901 (US) (74) Representative: Maikowski & Ninnemann Patentanwälte Partnerschaft mbB  Postfach 15 09 20 10671 Berlin 10671 Berlin (DE)