CONSORTIUM BLOCKCHAIN-BASED DATA TRANSFER METHOD AND DEVICE

Title:

CONSORTIUM BLOCKCHAIN-BASED DATA TRANSFER METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2020/108019

Kind Code:

A1

Abstract:

Disclosed are a consortium blockchain-based data transfer method and device. The method comprises: dividing data into a plurality of data blocks, correspondingly encrypting the data blocks using different symmetric keys to generate a plurality of data block cyphertexts, and numbering the data block cyphertexts and then uploading same to a blockchain; encrypting the symmetric keys using a public key of a first node to generate a first key ciphertext and then uploading the first key ciphertext to the blockchain; decrypting a numbered cyphertext from the blockchain using a private key of the first node to obtain a number of a data block ciphertext to be queried of a second node; and if the second node is allowed to perform querying, encrypting the corresponding symmetric key using a public key of the second node to generate a second key ciphertext, and sending the second key ciphertext to the second node by means of the blockchain, such that the second node uses its own private key to decrypt the second key ciphertext to obtain the corresponding symmetric key. The present invention ensures the security, controllability, and restorability of data, and improves the encryption/decryption efficiency.

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Inventors:

YAO PING (CN)
YAO LEI (CN)
WU JIE (CN)
JI FENG (CN)
HAN SONGJIANG (CN)

Application Number:

PCT/CN2019/106022

Publication Date:

June 04, 2020

Filing Date:

September 16, 2019

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Assignee:

SUNING CLOUD COMPUTING CO LTD (CN)
SUNING COM CO LTD (CN)

International Classes:

H04L9/32

Domestic Patent References:

WO2004034182A2

2004-04-22

Foreign References:

CN109587132A	2019-04-05
CN108462568A	2018-08-28
CN101127597A	2008-02-20
CN108092982A	2018-05-29
CN107370595A	2017-11-21
CN107659567A	2018-02-02

Attorney, Agent or Firm:

BEIJING LAWSING IP FIRM (CN)

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