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:
Nov. 07, 2023
Filed:
Sep. 03, 2021
Hitachi, Ltd., Tokyo, JP;
Hisayoshi Sato, Tokyo, JP;
Masayuki Yoshino, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A first terminal holds first encrypted data encrypted by using a first key by a first encryption scheme having deterministic and commutativity, a second terminal holds second encrypted data encrypted by using a second key by the first encryption scheme, the first terminal transmits the first encrypted data to the second terminal, the second terminal transmits the second encrypted data to the first terminal, the first terminal generates third encrypted data by encrypting the second encrypted data by using the first key by the first encryption scheme, the third encrypted data is transmitted to the second terminal, the second terminal decrypts the third encrypted data with the second key, and calculates a common part between the second encrypted data and the decrypted third encrypted data, and transmits the common part to the first terminal, and the first terminal decrypts the common part with the first key.