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. 25, 2025
Filed:
Jun. 08, 2022
Mitsubishi Electric Corporation, Tokyo, JP;
Yutaka Kawai, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A deduplication system () includes encryption apparatuses (), a conversion key generation apparatus (), a tag conversion apparatus (), and a match determination apparatus (). The encryption apparatuses () each generate encryption tag (ETag) using an encryption key (ek) and plaintext (M). The conversion key generation apparatus () generates a conversion key (ck) using the encryption key (ek) and a conversion key generation key (tk). The tag conversion apparatus () converts an encryption tag (ETag) for which the same plaintext (M) has been used into an encryption tag (T) that takes the same value regardless of a value of the encryption key (ek) used for the encryption tag (ETag) by applying the conversion key (ck) to the encryption tag (ETag). The match determination apparatus () determines whether the values of two encryption tags (T) match.