Patent SG-11201909012Y-A (SG)
Title: Key data processing method and apparatus, and server
Inventor: WU HAO
IPC: H04L9/08
Filed: 2018-08-28
Abstract: OBTAINAN ORIGINAL KEY OF A SHARED OBJECT IN A BLOCKCHA N, AND DETERMINE THE NUMBER OF PARTIES SHARING THE ORIGINAL KEY IPSO PROCESS THE ORIGINAL KEY BY USING A PREDETERMINED ALGOR THM, TO GENERATE THE I SAME NUMBER OF CHILD KEYS AS THAT OF PARTIES SHARING THE ORIGINAL KEY, WHERE - S THE CHILD KEYS ARE USED TO RESTORE THE ORIGINAL KEY WHEN THE SAME NUMBER OF CHILD KEYS ARE OBTAINED Gie N M O 71. ON O O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) CORRECTED VERSION (19) World Intellectual Property Organization International Bureau (43) International Publication Date 11111111111111011111111111111110111110 100111011111111101110111111411011111101111 (10) International Publication Number WO 2019/046317 A8 07 March 2019 (07.03.2019) WIP0 I PCT (51) International Patent Classification: H04L 9/08 (2006.01) (21) International Application Number: PCT/US2018/048370 (22) International Filing Date: 28 August 2018 (28.08.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 201710747807.5 28 August 2017 (28.08.2017) CN (71) Applicant: ALIBABA GROUP HOLDING LIMITED [—/US]; Fourth Floor, One Capital Place, P. 0. Box 847, George Town, Grand Cayman (KY). (72) Inventor: WU, Hao; Alibaba Group Legal Department 5/F, Building 3, No. 969 West Wen Yi Road, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). (74) Agent: STALFORD, Terry J. et al.; Fish & Richardson, P.C., P. 0. Box 1022, Minneapolis, Minnesota 55440-1022 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, 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, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (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, 1E, 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: — with international search report (Art. 21(3)) (54) Title: KEY DATA PROCESSING METHOD AND APPARATUS, AND SERVER FIG. 1 (57) : An original key of a shared object in a blockchain is obtained. The number of parties sharing the original key is deter- mined. The original key are processed by using a predetermined algorithm, to generate the same number of child keys as that of the number of parties sharing the original key, where the child keys are used to restore the original key when the same number of child keys are obtained. [Continued on next page] W() 2019/04631'7 A8 111111 11111110 DOI 11111 ME 0 III 1101 0 III IIIII IN 11111 IIIII 11111 II 1111101111 101111 (48) Date of publication of this corrected version: 12 September 2019 (12.09.2019) (15) Information about Correction: see Notice of 12 September 2019 (12.09.2019)