Patent AU-2019204712-B2 (AU)
Title: Managing sensitive data elements in a blockchain network
Inventor: FENG ZHIYUAN
IPC: H04L9/00
Filed: 2019-03-29
Granted: 2020-08-13
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
(1) Organization11111111111111111111111I1111111111111i1111liiiii 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2019/120326 A2 
27 June 2019 (27.06.2019) W IPO I PCT 
(51) International Patent Classification: 311121 (CN). CHENG, Long; Alibaba Group Legal De
Not classified partment 5/F, Building 3, No. 969 West Wen Yi Road, 
(21) International Application Number: Yuhang District, Hangzhou, Zhejiang 311121 (CN).  
PCT/CN2019/080493 (74) Agent: BEIJING BESTIPR INTELLECTUAL PROP
(22) International Filing Date• ERTY LAW CORPORATION; 
Room 409, Tower B, Ka 
29 March 2019 (29.03.2019) Wal Building, No. 9 Shangdi 3rd Street, Haidian District, 
Beijing 100085 (CN).  
(25) Filing Language: English (81) Designated States (unless otherwise indicated, for every 
(26) Publication Language: English kind ofnational protection available): AE, AG, AL, AM, 
(71) Applicant: ALIBABA GROUP HOLDING LIMITED AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
[-/CN]; Fourth Floor, One Capital Place, P.O. Box 847, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
[-/CN]rFurTloo rOeC apialmla cDZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, 
GeorgeTown,GrandCayman(KY). HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 
(72) Inventors: FENG, Zhiyuan; Alibaba Group Legal Depart- KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
ment 5/F, Building 3, No. 969 West Wen Yi Road, Yuhang MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 
District, Hangzhou, Zhejiang 311121 (CN). LI, Yanpeng; OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
Alibaba Group Legal Department 5/F, Building 3, No. 969 
West Wen Yi Road, Yuhang District, Hangzhou, Zhejiang 
(54) Title: MANAGING SENSITIVE DATA ELEMENTS IN A BLOCKCHAIN NETWORK 
- ~300 
310( d 
(Consensusno-e) 
3028 302b 
(Non-consensus node) (osnu oe 
FIG. 3 
% (57) Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded oncomputer storage 
~media, formanaging sensitive dataelements stored in ablockchain network. One ofthe methods includes receiving arequest from a 
O client device toperform amodification toa watch listthat isstored inthe blockchain network. The watch list includes one or more 
Clsensitive 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, aconsensus 
~procedure isperformedonthe request within theblockchain network. After aconsensus isachieved, theblockchainnetwork node 
o updates thewatch listbased onthe modification to the watch list.  
302
W O 2019/120326 A2/120326||||||||||||||||I|I|||I|1|11|D||I|||IIIDI|||I||1|11 ||||||||||||||| 
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, Fl, 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 2](2)(a) 
- without international search report and to be republished 
upon receipt of that report (Rule 48.2(g))