Patent SG-11201908982Q-A (SG)
Title: Managing sensitive data elements in a blockchain network
Inventor: FENG ZHIYUAN
Filed: 2019-03-29
Abstract: bConsensus node) 302f (Non-consensus node) 302e (Non-consensus node) 302c (Consensus node) (51) International Patent Classification: Not classified (21) International Application Number: PCT/CN2019/080493 (74) (22) International Filing Date: 29 March 2019 (29.03.2019) (25) Filing Language: English (26) Publication Language: English (71) Applicant: ALIBABA GROUP HOLDING LIMITED [—/CN]; Fourth Floor, One Capital Place, P.O. Box 847, George Town, Grand Cayman (KY). (72) Inventors: FENG, Zhiyuan; Alibaba Group Legal Depart- ment 5/F, Building 3, No. 969 West Wen Yi Road, Yuhang District, Hangzhou, Zhejiang 311121 (CN). LI, Yanpeng; Alibaba Group Legal Department 5/F, Building 3, No. 969 West Wen Yi Road, Yuhang District, Hangzhou, Zhejiang 311121 (CN). CHENG, Long; Alibaba Group Legal De- partment 5/F, Building 3, No. 969 West Wen Yi Road, Yuhang District, Hangzhou, Zhejiang 311121 (CN). Agent: BEIJING BESTIPR INTELLECTUAL PROP- ERTY LAW CORPORATION; Room 409, Tower B, Ka Wah Building, No. 9 Shangdi 3rd Street, Haidian District, Beijing 100085 (CN). (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, (54) Title: MANAGING SENSITIVE DATA ELEMENTS IN A BLOCKCHAIN NETWORK 300 304 Clients 302a (Consensus node) M O ON O C (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 27 June 2019 (27.06.2019) WIPO I PCT 11111111111110111111111111111101111101011101111111111111111110111111111111011110111111 (10) International Publication Number WO 2019/120326 A2 302d (Consensus node) FIG. 3 (57) : Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing sensitive data elements stored in a blockchain network. One of the methods includes receiving a request from a client device to perform a modification to a watch list that is stored in the blockchain network. The watch list includes one or more sensitive data elements. The blockchain network node determines whether the client device is authorized to modify the watch list based on a digital signature in the request. In response to determining that the client device is authorized to modify the watch list, a consensus procedure is performed on the request within the blockchain network. After a consensus is achieved, the blockchain network node updates the watch list based on the modification to the watch list. [Continued on next page] WO 2019/120326 A2 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII1011IIIIIIIIIIIII1OIIIIIII1 O IIIIIIIIIIIIIIIIIIII110IIIIII 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, 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))