SG11201903552PA - Blockchain data protection using homomorphic encryption - Google Patents

Blockchain data protection using homomorphic encryption

Info

Publication number
SG11201903552PA
SG11201903552PA SG11201903552PA SG11201903552PA SG11201903552PA SG 11201903552P A SG11201903552P A SG 11201903552PA SG 11201903552P A SG11201903552P A SG 11201903552PA SG 11201903552P A SG11201903552P A SG 11201903552PA SG 11201903552P A SG11201903552P A SG 11201903552PA
Authority
SG
Singapore
Prior art keywords
account
random number
international
public key
node
Prior art date
Application number
SG11201903552PA
Inventor
Wenbin Zhang
Baoli Ma
Original Assignee
Alibaba Group Holding Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alibaba Group Holding Ltd filed Critical Alibaba Group Holding Ltd
Publication of SG11201903552PA publication Critical patent/SG11201903552PA/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/008—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols involving homomorphic encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3218—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using proof of knowledge, e.g. Fiat-Shamir, GQ, Schnorr, ornon-interactive zero-knowledge proofs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
    • H04L9/3239—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/08—Randomization, e.g. dummy operations or using noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/16—Obfuscation or hiding, e.g. involving white box
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/56—Financial cryptography, e.g. electronic payment or e-cash

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) --, (19) World Intellectual Property MTh 0 111111 11 111 11111 0 11 110 1 0 01 11111111 0 11 0 11 11111 110 11110 111 0 11 1111 Organization International Bureau (10) International Publication Number (43) International Publication Date ....0•\" WO 2019/072269 A2 18 April 2019 (18.04.2019) WIP0 I PCT (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every Not classified kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (21) International Application Number: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, PCT/CN2018/114421 DZ, EC, EE, EG, ES, FI, 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, 07 November 2018 (07.11.2018) KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (25) Filing Language: English 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, (26) Publication Language: English 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. (71) Applicant: ALIBABA GROUP HOLDING LIMITED [—/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, KE, 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, Yuhang District, Hangzhou, Zhejiang 311121 (CN). MA, EE, ES, FI, FR, GB, GR, HR, HU, 1E, IS, IT, LT, LU, LV, Baoli; Alibaba Group Legal Department, 5/F, Building 3, MC, MK, 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, Zhejiang 311121 (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: BLOCKCHAIN DATA PROTECTION USING HOMOMORPHIC ENCRYPTION (57) : Implementations of the present disclosure include receiving, by a consensus node from a first account, a digitally signed copy of a com- 300 i mitment value of a transaction amount, a second random number encrypted using a public key of the first account, a third random number encrypted using = = = „,„,, A ,--302 Bloacoalo Noce ,z - 304 a public key of the second account, one or more range proofs, and a set of values generated based on one or more selected random numbers. The con- 306 sensus node then verifies a digital signature corresponding to the digitally = — General g a commilmentvalue of a tansacdon amountba Boon a firstra dom number, and encypOng, based on bamomorphi- entryplon, a second randomnumber using a publk begat u &lute A, and a third random number using a public key °fuser rode B . signed copy using a public key of the first account corresponding to a private key used to generate the digital signature. It also updates the balance of the = = 308 first account and a balance of the second account based on the amount of the = Geneadng more range , to o . balance transfer if the first random number, the second random number, and — 310 the third random number are the same. = — Generating a sere`.: les bast i co on: rmoreselected • cndon nu • cl — = ' 312 Usicg a oroate key cie3er 3fe digital s , onattr3 . 314 . Subotitung a diva ly signeo cooy Lo a blockchain network 316 Cl t'erit t ing the d.gital signature 318 C \ Vent' ng the ore or more range mots • • l;; 320 Cl N Determining the 3rstracdone contoec the second random number ardtre ttt.id rcodom^utroctate IT S311.3. beset' on the set ctva mos • N 322 e Uodaing account halanres of ,er node A and user node 3 • ......\" IT 1-1 0 C'1 FIG.3 C [Continued on next page] WO 2019/072269 A2 IIIN I 0111110111010111111110n1001110111111 VIII VIII IIIII IINHEMIE 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 upon receipt of that report (Rule 48.2(g)) to be republished
SG11201903552PA 2018-11-07 2018-11-07 Blockchain data protection using homomorphic encryption SG11201903552PA (en)

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Application Number Priority Date Filing Date Title
PCT/CN2018/114421 WO2019072269A2 (en) 2018-11-07 2018-11-07 Blockchain data protection using homomorphic encryption

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US (1) US10615960B2 (en)
EP (1) EP3545640B1 (en)
JP (1) JP6767580B2 (en)
KR (1) KR102348768B1 (en)
CN (1) CN110546667B (en)
AU (1) AU2018348319B2 (en)
BR (1) BR112019008151A2 (en)
CA (1) CA3041161C (en)
ES (1) ES2876926T3 (en)
MX (1) MX2019004662A (en)
PH (1) PH12019500877A1 (en)
PL (1) PL3545640T3 (en)
RU (1) RU2708344C1 (en)
SG (1) SG11201903552PA (en)
TW (1) TWI718585B (en)
WO (1) WO2019072269A2 (en)

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RU2708344C1 (en) 2019-12-05
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