The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2025
Filed:
Feb. 21, 2022
Gfs Corporation, Tokyo, JP;
Toshiyuki Uehara, Chiba, JP;
Yoshiaki Takahashi, Tokyo, JP;
GFS Corporation, Tokyo, JP;
Abstract
A seal management apparatus for managing an electronic sealing service performs the steps of receiving seal-required data to be used for the sealing service from a user terminal of a user of the sealing service, generating (a) a seal secret key for sealing the seal-required data and (b) a seal public key used for verifying the seal, in a working memory, when the seal-required data is received, registering the seal public key in a blockchain, acquiring a seal identifier that is an identifier for acquiring the seal public key registered in the blockchain from the blockchain, generating a sealed file by affixing a signature of the seal secret key to a file containing the seal-required data and the seal identifier, deleting the seal secret key from the working memory, and transmitting the seal identifier to the user terminal.