US 12,341,912 B2
Method for confirming ownership of digital assets based on hash algorithm and method for tracing to a source of digital assets based on hash algorithm
Zengbing Chen, Nanjing (CN); Tongkai Xu, Nanjing (CN); Mengya Zhu, Nanjing (CN); Boohea Foo, Nanjing (CN); Ge Yang, Nanjing (CN); and Chengyang Zhao, Nanjing (CN)
Assigned to NANJING UNIVERSITY, Jiangsu (CN); and MATRICTIME DIGITAL TECHNOLOGY CO., LTD, Jiangsu (CN)
Appl. No. 18/245,383
Filed by NANJING UNIVERSITY, Jiangsu (CN); and MATRICTIME DIGITAL TECHNOLOGY CO., LTD, Nanjing Area (CN)
PCT Filed Sep. 14, 2022, PCT No. PCT/CN2022/118786
§ 371(c)(1), (2) Date Mar. 15, 2023,
PCT Pub. No. WO2023/178941, PCT Pub. Date Sep. 28, 2023.
Claims priority of application No. 202210274573.8 (CN), filed on Mar. 21, 2022.
Prior Publication US 2024/0297797 A1, Sep. 5, 2024
Int. Cl. H04L 9/32 (2006.01); H04L 9/06 (2006.01)
CPC H04L 9/3268 (2013.01) [H04L 9/0643 (2013.01); H04L 9/3247 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for confirming ownership of digital assets based on a hash algorithm, comprising:
(1) issuing a CA user certificate to an original user and generating a service serial number o1 by a CA authentication center; authenticating a private CA user certificate CA2 of the CA user certificate with the original user by the CA authentication center; after the authentication is successful, generating a one-time CA certificate otCA by each of the CA authentication center and the original user;
(2) sending a digital asset M to a digital asset authentication center and meanwhile generating a service serial number o2 by the original user; performing authentication on the digital asset M with the original user by the digital asset authentication center, and after the authentication is successful, generating an authentication document of the digital asset M by each of the digital asset authentication center and the original user;
(3) generating a service serial number o3 of quantum digital signature and generating a signature document docM by the original user; conducting a three-party quantum digital signature for the signature document docM by the CA authentication center, the digital asset authentication center and the original user, wherein the original user is a signing party, the CA authentication center and the digital asset authentication center are signature verification parties; after successfully verifying the signature by both the CA authentication center and the digital asset authentication center, conducting an identity verification by the CA authentication center and conducting a document verification by the digital asset verification center; when both the identity verification and the document verification are successful, ownership confirmation of the digital asset is successful while producing a service serial number o4 and entering next step; otherwise, verification of the signature is unsuccessful, a current process of confirming ownership of the digital asset is terminated or a new process of confirming ownership is initiated; and
(4) generating an ownership confirmation document of the digital asset M by the original user.