Patent AU-2018347190-B2 (AU)
Title: Blockchain data protection based on account note model with zero-knowledge proof
Inventor: MA BAOLI
IPC: G06F21/34
Filed: 2018-11-07
Granted: 2020-10-22
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 2019/072268 A2 
18 April 2019 (18.04.2019) W IPO I PCT 
(51) International Patent Classification: Department 5/F, Building 3, No. 969 West Wen Yi Road, 
Not classified Yuhang District, Hangzhou, Zhejiang 311121 (CN).  
(21) International Application Number: (74) Agent: BEIJING BESTIPR INTELLECTUAL PROP
PCT/CN2018/114420 ERTY LAW CORPORATION; Room 409, Tower B, Ka 
(22)InternationalFilingDate: Wal Building, No. 9 Shangdi 3rd Street, Haidian District, 
07 November 2018 (07.11.2018) Beijing100085(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: ALIBABAGROUPHOLDING LIMITED DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, 
[-/CN]; Fourth Floor,One Capital Place,P.O.Box847 HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 
GeorgeTown,GrandCayman(KY). KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
(72) Inventors: MA, Baoli; Alibaba Group Legal Department MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 
5/F, Building 3, No. 969 West Wen Yi Road, Yuhang Dis- OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
trict, Hangzhou, Zhejiang 311121 (CN). ZHANG, Wen- SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 
bin; Alibaba Group Legal Department 5/F, Building 3, No. TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.  
969 West Wen Yi Road, Yuhang District, Hangzhou, Zhe- (84) Designated States (unless otherwise indicated, for every 
jiang 311121 (CN). MA, Huanyu; Alibaba Group Legal kind of regional protection available): ARIPO (BW, GH, 
Department5/F,Building3,No.969WestWenYiRoad GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
Yuhang District, Hangzhou, Zhejiang 311121 (CN). LIU, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
Zheng; Alibaba Group Legal Department 5/F, Building 3, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
No. 969 West Wen Yi Road, Yuhang District, Hangzhou, EE,ES,FIFR,GB,GR,HR,HU,IIS,IT,LT,LU,LV, 
Zhejiang 311121 (CN). LI, Lichun; Alibaba Group Legal MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI,SK, SM, 
(54) Title: BLOCKCHAIN DATA PROTECTION BASED ON ACCOUNT NOTE MODEL WITH ZERO-KNOWLEDGE PROOF 
(57) Abstract: Implementations of the present disclosure include receiving, 
from a first account, a digitally signed copy of a plurality of notes, a commit
ment of a transaction amount of a transaction between the first account and a 
second account paid by at least a portion of the plurality of notes, a commitment 
UedA l 304 of a change from deducting the transaction amount from a total value of the 
plurality of notes, and a zero-knowledge proof generated based on one or more 
306 selected random numbers. The first account determines that the total value of 
the plurality of notes equals the sum of the transaction amount and the change, 
308 300 validates the transaction, and updates the first account and the second account 
310 based on the plurality of notes, the transaction amount, and the change.  
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- Sonn~d2I~sedcw~t~~ann FK 320 
----~ 322 _ 
QO 326 
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FIG334
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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))