US 12,137,177 B2
Credible alliance blockchain digital calibration certificate system and operation method therefor
Xiang Fang, Beijing (CN); Xingchuang Xiong, Beijing (CN); Feng Tian, Beijing (CN); Yichuan Tang, Beijing (CN); Wenkui He, Beijing (CN); and Zhen Liu, Beijing (CN)
Assigned to NATIONAL INSTITUTE OF METROLOGY, CHINA, Beijing (CN)
Appl. No. 17/609,213
Filed by NATIONAL INSTITUTE OF METROLOGY, CHINA, Beijing (CN)
PCT Filed Mar. 30, 2020, PCT No. PCT/CN2020/081991
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2021/168981, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202010130811.9 (CN), filed on Feb. 28, 2020.
Prior Publication US 2022/0393890 A1, Dec. 8, 2022
Int. Cl. H04L 9/32 (2006.01); H04L 9/00 (2022.01); H04L 9/40 (2022.01)
CPC H04L 9/50 (2022.05) [H04L 9/3247 (2013.01); H04L 9/3263 (2013.01); H04L 9/3268 (2013.01); H04L 63/0823 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A trusted alliance block chain digital calibration certificate system, wherein the system comprises: a distributed ledger system, a certification authority CA system, a coordinated universal time UTC time calibration server, and a digital calibration certificate subsystem; wherein:
the distributed ledger system is a distributed storage system based on a hyperledger fabric, the distributed ledger system comprising at least one block chain node, and the block chain node is associated with the CA system, the UTC time calibration server, the digital calibration certificate subsystem and the public query subsystem, respectively;
the CA system is used for management of all entity identity certificates and registration of identities in the system;
the UTC time calibration server is used for providing a UTC time calibration service for all block chain node servers of the system, to ensure that the block chain node server time and data block built-in time stamps of the system have uniform high accuracy and are synchronized with the world standard time; and also ensure that information of each digital calibration certificate has the same ultra-high-precision time frequency information;
the digital calibration certificate subsystem is used for generating, by means of alliance management, instrument organization management, and calibration institution management, a digital calibration certificate from calibration certificate data by a digital signature technology;
a public query subsystem, which is used for providing for the public with query services including verifying authenticity of calibration certificates, verifying whether a measurement value specified thereof has a calibration certificate, and whether a traceability chain of a quantity value is complete that utilizes a unique digital identification number (ID) for retrieval and association; and
extracting related entity information from the public query, and forming original information of multiple data blocks based on the ID in the query;
wherein the digital calibration certificate subsystem comprises a digital calibration certificate module, which further comprises a calibration institution management module, an instrument organization management module and an alliance management module; wherein, the calibration institution management module is an institution with calibration qualifications and calibration capabilities; the instrument organization management module is a functional module through which the calibration institution management module with commission for measuring instruments performs calibration on its instruments; the alliance management module is a maintainer for public and published information of an alliance chain;
wherein the calibration institution management module further comprises a calibrator module, a verifier module, an approver module and an error verifier module.