Patent SG-11201903541Y-A (SG)
Title: Asymmetric key management in consortium blockchain networks
Inventor: ZHANG YIXIANG
Filed: 2018-11-27
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property M Th 0 111111 11 111 11111 0 11 110 1 0 111 11111 11 11 0 11 11 111 11111 0 11 11110 111 0 11 1111 Organization .- -- International Bureau (10) International Publication Number (43) International Publication Date .....0•\"1 WO 2019/072281 A2 18 April 2019 (18.04.2019) WIP0 I PCT (51) International Patent Classification: No.969 West Wen Yi Road, Yu Hang District, Hangzhou, Not classified Zhejiang 311121 (CN). (21) International Application Number: (74) Agent: BEIJING BESTIPR INTELLECTUAL PROP- PCT/CN2018/117576 ERTY LAW CORPORATION; Room 409, Tower B, Ka (22) International Filing Date: Walt Building, No. 9 Shangdi 3rd Street, Haidian District, 27 November 2018 (27.11.2018) Beijing 100085 (CN). (25) Filing Language: English (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (26) Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, (71) Applicant: ALIBABA GROUP HOLDING LIMITED DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, [—/CN]; Fourth Floor, One Capital Place, P.O. BOX 847, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, George Town, Grand Cayman (KY). KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (72) Inventors: ZHANG, Yixiang; Alibaba Group Legal De- MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, partment 5/F, Building 3, No.969 West Wen Yi Road, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). LI, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, Shubo; Alibaba Group Legal Department 5/F, Building 3, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (54) Title: ASYMMETRIC KEY MANAGEMENT IN CONSORTIUM BLOCKCHAIN NETWORKS 1304 y 302 A y 320 Cent Participant 'I BaaS Server I I — Upload identity certificate I I — T i I I _L Key request T _L po, Configure key permissions Return key pair Check permissions, generate service key el -f Il (57) : °IC N a participant in N for the service key Cproviding g a key package to the participant, Il 0 NI NI works within a blockchain-as-a-service -I- I a consortium based package including an encrypted private key of the service key, and a public Implementations Decrypt, retrieve key FIG. 3B of the present specification provide for management of (BaaS) platform. Implementations include actions blockchain network provisioned within the BaaS platform, on a service authorization table that records participant privileges the participant decrypting the private key of the service key using T I 1 I I I service keys for consortium blockchain net- of receiving a request for a service key from determining that the participant is authorized within the consortium blockchain network, key of the service key, and sending the key a public key associated with the participant. C [Continued on next page] WO 2019/072281 A2 111111 I 01111I 0111010111111110111110 1 001 II 11111011111111111110 (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — upon request of the applicant, before the expiration of the time limit referred to in Article 21(2)(a) — without international search report and to be republished upon receipt of that report (Rule 48.2(g))