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.

Date of Patent:
Nov. 15, 2022

Filed:

Apr. 09, 2020
Applicant:

Casio Computer Co., Ltd., Tokyo, JP;

Inventor:

Ryo Nimura, Fussa, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/40 (2022.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01);
Abstract

A server apparatus is capable of communicating with a client terminal. The client terminal transmits first information to a second server, receives a digital signature from the second server, and transmits the digital signature together with the first information to the server apparatus. The second server generates the digital signature based on the first information. The server apparatus includes a controller configured to receive the first information and the digital signature from the client terminal, determine whether or not the first information is valid based on the first information and the digital signature received; and, transmit second information to the client terminal when the first information is valid.


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