Patent SG-11201903425P-A (SG)
Title: System and method for information protection
Inventor: MA HUANYU
Filed: 2018-11-27
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) --, (19) World Intellectual Property MTh 0 111111 11 111 11111 0 11110 1 0 111 11111 11 11 0 110111 11 111 II 11 11110111 0 11 1111 Organization International Bureau (10) International Publication Number (43) International Publication Date ......•*\") WO 2019/072277 A2 18 April 2019 (18.04.2019) WIP0 I PCT (51) International Patent Classification: Department 5/F, Building 3, No.969 West Wen Yi Road, Not classified Yu Hang District, Hangzhou, Zhejiang 311121 (CN). (21) International Application Number: (74) Agent: BEIJING BESTIPR INTELLECTUAL PROP- PCT/CN2018/117558 ERTY LAW CORPORATION; Room 409, Tower B, Ka (22) International Filing Date: Wall Building, No. 9 Shangdi 3rd Street, Haidian District, 27 November 2018 (27.11.2018) Beijing 100085 (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: ALIBABA GROUP HOLDING LIMITED DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, [—/CN]; Fourth Floor, One Capital Place, P.O. BOX 847, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, George Town, Grand Cayman (KY). KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (72) Inventors: MA, Huanyu; Alibaba Group Legal Depart- MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, ment 5/F, Building 3, No.969 West Wen Yi Road, Yu OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, Hang District, Hangzhou, Zhejiang 311121 (CN) ZHANG, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, Wenbin; Alibaba Group Legal Department 5/F, Building 3, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. No.969 West Wen Yi Road, Yu Hang District, Hangzhou, (84) Designated States (unless otherwise indicated, for every Zhejiang 311121 (CN). MA, Baoli; Alibaba Group Legal kind of regional protection available): ARIPO (BW, GH, Department 5/F, Building 3, No.969 West Wen Yi Road, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, Zhejiang 311121 Yu Hang District, Hangzhou, (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, Yu Hang District, Hangzhou, EE, ES, FI, FR, GB, GR, HR, HU, 1E, IS, IT, LT, LU, LV, —_ Zhejiang 311121 (CN). CUI, Jiahui; Alibaba Group Legal MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, = = Title: SYSTEM AND METHOD FOR INFORMATION PROTECTION (54) 3001 (57) : A computer-implemented method for information protection com- prises: committing a transaction amount of a transaction with a first commitment — all; committing a transaction amount t of a transaction with a rst fi commitment scheme to obtain a transaction commitment value T, and scheme to obtain a transaction commitment value, committing a change of the = = committing a change y of the transaction with a second commitment transaction with a second commitment scheme to obtain a change commitment scheme to obtain a change commitment value Y, the first commitment value, the first commitment scheme comprising a transaction blinding factor, and — = scheme comprising a transaction blinding factor r„ and the second the second commitment scheme comprising a change blinding factor; encrypting commitment scheme comprising a change blinding factor r y a first combination of the change blinding factor and the change with a first key; _ = _ transmitting the transaction blinding factor, the transaction amount, and the trans- 2g2; encrypting a first combination of the change blinding factor r y and action commitment value to a recipient node associated with a recipient for the = the change y with a first key KA recipient node to verify the transaction; in response to that the recipient success- = fully verifies the transaction, obtaining an encrypted second combination of the = — transaction blinding factor and the transaction amount encrypted with a second = key. X).2; transmitting the transaction blinding factor r, the transaction — amount t, and the transaction commitment value T to a recipient node associated with a recipient of the transaction for the recipient node to verify the transaction Cl 461 1 ll in response to that the recipient node successfully verifies the transaction, obtaining an encrypted second combination of the h transaction blinding factor r and the transaction amount t encrypted with a second key KB h NI NI =transmitting the encrypted first combination and the encrypted 0 second combination to a plurality of nodes in a blockchain for the nodes C.: in the blockchain to verify the transaction Il e FIG. 3 NI C [Continued on next page] WO 2019/072277 A211111110111110111111111111111101111101 II 01 IIIEMOHOIHEMIHNHOHE 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))