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:
Jan. 08, 2019
Filed:
Jan. 12, 2017
Hitachi, Ltd., Tokyo, JP;
Kota Ideguchi, Tokyo, JP;
Eriko Ando, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A user permission check system with less CPU throughput while ensuring non-repudiation is provided. In order to solve the above-described problem, in the present invention firstly, a MAC function that does not require a CPU to have high processing power is utilized. Additionally, a message is encrypted with a plurality of secret keys and the plurality of keys are distributed to a plurality of servers to make them have the keys in order to ensure validity of the message as a proof of non-repudiation. Subsequently, each server proves the validity of the message within its own range and the validity of the message is ensured by aggregating these individual results, thereby implementing the non-repudiation.