Patent SG-11201903419W-A (SG)
Title: System and method for information protection
Inventor: CUI JIAHUI
Filed: 2018-11-27
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property M Th 0 111111 11 111 11111 0 11 110 1 0 01 11111111 0 11 11 111111 110 11110 111 0 11 1111 Organization --- -- International Bureau (10) International Publication Number (43) International Publication Date .....0•\" WO 2019/072279 A2 18 April 2019 (18.04.2019) WIP0 I PCT (51) (21) (22) (25) Filing Language: (26) (71) (72) International Patent Classification: Hang District, Hangzhou, Zhejiang Not classified Wenbin; Alibaba Group Legal International Application Number: No.969 West Wen Yi Road, Yu Hang District, Hangzhou, Zhejiang 311121 (CN). MA, PCT/CN2018/117571 gal Department 5/F, Building International Filing Date: Yu Hang District, Hangzhou, Zhejiang 311121 (CN). 27 November 2018 (27.11.2018) (74) Agent: BEIJING BESTIPR English ERTY LAW CORPORATION; Publication Language: English Wall Building, No. 9 Shangdi 3rd Street, Haidian District, Beijing 100085 (CN). Applicant: ALIBABA GROUP HOLDING LIMITED (81) Designated States (unless [—/CN]; Fourth Floor, One Capital Place, P.O. BOX 847, kind of national protection George Town, Grand Cayman (KY). AO, AT, AU, AZ, BA, BB, Inventors: CUI, Jiahui; Alibaba Group Legal Department CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 5/F, Building 3, No.969 West Wen Yi Road, Yu Hang Dis- DZ, EC, EE, EG, ES, FI, GB, trict, Hangzhou, Zhejiang 311121 (CN). MA, Baoli; Al- HR, HU, ID, IL, IN, IR, IS, ibaba Group Legal Department 5/F, Building 3, No.969 KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, West Wen Yi Road, Yu Hang District, Hangzhou, Zhe- MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, jiang 311121 (CN). LIU, Zheng; Alibaba Group Legal De- OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, partment 5/F, Building 3, No.969 West Wen Yi Road, Yu 311121 (CN) ZHANG, Department 5/F, Building 3, Huanyu; Alibaba Group Le- 3, No.969 West Wen Yi Road, INTELLECTUAL PROP- Room 409, Tower B, Ka otherwise indicated, for every available): AE, AG, AL, AM, BG, BH, BN, BR, BW, BY, BZ, GD, GE, GH, GM, GT, HN, JO, JP, KE, KG, KH, KN, KP, = Title: SYSTEM AND METHOD : A computer-implemented to obtain a transaction a combination of the transaction blinding factor r_t and the transaction amount t with a public key PK_B of a recipient of transaction; and transmitting recipient for the recipient node to verify the transaction. — --..., encrypting FOR INFORMATION PROTECTION 7 4 a transaction with a commitment a transaction blinding factor r_t; = (54) = = = = 301: committing a transaction amount t of a transaction with a transaction commitment value T, at least a transaction banding r_t commitment scheme to obtain a the commitment scheme comprising factor = = = = — = 302: encrypting a combination of the transaction blinding factor r_t a public key PK_B of a recipient of the transaction and the transaction amount t with = = V = = 303: transmitting the transaction commitment value I and the node associated with the to verify the transaction encrypted combination to a recipient recipient for the recipient node N CT IN N el (57) t scheme 0 the Il C the N FIG. 3A method comprises: committing a transaction amount t of commitment value T, the commitment scheme comprising at least the transaction commitment value T and the encrypted combination to a recipient node associated with C [Continued on next page] WO 2019/072279 A2 111111 11111111 01110101111111101H0 1 001 II II III II III 11111 II III IIIIMEMIE 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))