Patent ID: 11936799
Assignee: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for generating a timestamp for a digital signature based on a blockchain, the method comprising:
acquiring a message;
obtaining hash values of latest confirmed n blocks; wherein n≥12 in Ethereum and n≥6 in Bitcoin;
generating a new message by combining said message with said hash values of said latest confirmed n blocks;
signing said new message and generating a signature;
generating a hash value HT by hashing said new message and said signature;
generating a transaction by embedding the hash value HT with a valid address on the blockchain;
sending said transaction to blockchain miners and generating and confirming a transaction block containing said transaction; and
establishing a timestamp for said signature, wherein said timestamp is an interval between the generation time of the latest one of said latest confirmed n blocks and the generation time of the transaction block.