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:
Apr. 07, 2020
Filed:
Sep. 27, 2017
Seiko Epson Corporation, Tokyo, JP;
Akio Takamoto, Shiojiri, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A printing apparatus includes: a printing apparatus storage unit that stores firmware to which a public key is added, the public key being information related to a public key encryption method; a printing apparatus network-communication unit that receives signature information obtained by encrypting a hash value of overwriting firmware with a private key corresponding to the public key, from the management server, and that receives the overwriting firmware from the file providing server; and a printing apparatus control unit that determines validity of the overwriting firmware by comparing a hash value generated by decrypting the signature information which is received from the management server with the public key stored in the printing apparatus storage unit, and a hash value of the overwriting firmware which is received from the file providing server.