Patent SG-11201906830X-A (SG)
Title: Verifying integrity of data stored in a consortium blockchain using a public sidechain
Inventor: CHENG LONG
Filed: 2018-12-21
Abstract: WO /07 230 1 A2 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 18 April 2019 (18.04.2019) WIPO I PCT 111111111111110111111111111111101111101001111111111111111111111111101111111011110111111 (10) International Publication Number WO 2019/072301 A2 400 302 Cmsortan Netiort St I 405 - calve newly star 410 Cr Pt, 1 , , dr4 a 'a ‘ t ' divot 1 (51) International Patent Classification: Not classified (21) International Application Number: PCT/CN2018/122559 (22) International Filing Date: 21 December 2018 (21.12.2018) (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: CHENG, Long; Alibaba Group Legal Depart- ment 5/F, Building 3, No.969 West Wen Yi Road, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). LI, Yanpeng; Alibaba Group Legal Department 5/F, Building 3, No.969 West Wen Yi Road, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). FENG, Zhiyuan; Alibaba Group Legal De- partment 5/F, Building 3, No.969 West Wen Yi Road, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). (74) Agent: BEIJING BESTIPR INTELLECTUAL PROP- ERTY LAW CORPORATION; Room 409, Tower B, Ka With 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, 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). (54) Title: VERIFYING INTEGRITY OF DATA STORED IN A CONSORTIUM BLOCKCHAIN USING A PUBLIC SIDECHAIN (57) : Implementations of the present specification include stor- ing a data item in a consortium blockchain; generating a first data digest based on the stored data item; sending the first data digest to verification nodes to cryptographically signs it and stores the signed first data digest 316 330 352 in a public blockchain; receiving a request to retrieve the stored data item; retrieving the requested data item from the consortium blockchain; gen- Pdic erating a second data digest based on the retrieved data item; sending the loch. ketaarx second data digest to verification nodes so that each verification node signs the second data digest; receiving the signed second data digests from the plurality of verification nodes; retrieving the signed first data digests from the public blockchain; determining that the signed first data digests match the signed second data digests; and sending a response indicating the stored data item is unchanged to the request to retrieve the stored data item. P.equest vent,:diLil of 31.1406; .1* dab I 4 7 5 e key Stow gnat op 5&sdechain 430 FIG. 4 [Continued on next page] WO 2019/072301 A2 111111 11111111 01110101111111101H0 1 001 II II III IIIII 1111111111 0 II 111110111111111111 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))