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:
Oct. 17, 2023
Filed:
Dec. 03, 2020
Fujitsu Limited, Kawasaki, JP;
Takeshi Miyamae, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An unauthorized use detection system includes apparatuses and a hash chain that records, for each piece of data, a data structure that includes a hash value of entire data and hash values calculated with respect to a plurality of partial areas obtained from a specific procedure using the hash value of the entire data. One of the apparatuses reads out the data structure associated with the data of one of comparison targets from the hash chain. The apparatus calculates, regarding data of the other one of the comparison targets, hash values of the plurality of partial areas obtained from the specific procedure using the hash value of the entire data included in the read data structure. The apparatus compares the hash values of the plurality of partial areas included in the read data structure with the calculated hash values of the plurality of partial areas related to the other one.