Patent AU-2018348333-A1 (AU)
Title: Data isolation in a blockchain network
Inventor: ZHANG WENBIN
IPC: H04L9/32
Filed: 2018-12-13
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 2019/072293 A2 
18 April 2019 (18.04.2019) W IPO I PCT 
(51) InternationalPatent Classification: (81) Designated States (unless otherwise indicated, for every 
Not classified kind ofnational protection available): AE, AG, AL, AM, 
AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
(21)InternationalApplicationNumber: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
PCT/CN2018/120805 DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, 
(22) International Filing Date: HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 
13 December 2018 (13.12.2018) 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, 
(25)FilingOLanguage: English M, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
(26) Publication Language: English SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 
(71) Applicant: ALIBABA GROUP HOLDING LIMITED TR, TT, TZ, UA, UG, US, UZ, VC, VN, 
ZA, ZM, ZW.  
[-/CN]; Fourth Floor, One Capital Place, P.O. Box 847, (84) Designated States (unless otherwise indicated, for every 
George Town, Grand Cayman (KY). kind of regional protection available): ARIPO (BW, GH, 
GM,RKE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
(72) Inventors: ZHANG, Wenbin; Alibaba Group Legal De- UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
partment 5/F, Building 3, No.969 West Wen Yi Road, TM), European(AL,AT, BE,BG, CH, CY, CZ, DE, DK, 
YuhangDistrict, Hangzhou, Zhejiang 311121 (CN). SHEN, EE,ES, FFR, GB,GR, HR, HU, IIS, IT, LT, LU, LV, 
Chao; Alibaba Group Legal Department 5/F, Building 3, MC, F, MT, NL,NO, PL, PT, RO, RS, SE, SI, SK, SM, 
No.969 West Wen Yi Road, Yuhang District, Hangzhou, TR), OAPI (BF, BJ, CF,CG, CI, CM, GA, GN, GQ, GW, 
Zhejiang311121(CN). KM, ML, MR, NE, SN, TD, TG).  
(74) 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).  
(54) Title: DATA ISOLATION IN A BLOCKCHAIN NETWORK 
(57) Abstract: Implementations of the present specification include re
400 ceiving, by a blockchain node in the blockchain network, a request to 
read a particularblock of the blockchain, wherein the request is received 
from a light-weight node of the blockchain network and includes an 
identity of the light-weight node, and wherein the particular block in
Rvetr402 cludesanoriginalMerkletreeassociatedwiththeparticularblock;iden
iweiue9T nodemgrr;ineg ¶ -[ [e tifying, by the blockchain node, permissions associated with the identity 
of the light-weight node; generating, by the blockchain node, an isolat
ed Merkle tree based on the original Merkle tree included in the block, 
the isolated Merkle tree including only transactions from the original 
d sh 1404 Merkletreethataredeterminedtobeaccessiblebythelight-weightnode 
based on the identified permissions, wherein the isolated Merkle tree is 
consistent with the original Merkle tree; and sending, by the blockchain 
node, a response to the light-weight node including the isolated Merkle 
FIG.e4 
(N c spcrscc oteigig h ocrvi tho iso~oIcj Mor408 
__ FIG. 4 
CA
W O 2019/072293 A2293||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 
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))