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:
May. 26, 2026
Filed:
Jul. 18, 2024
Kabushiki Kaisha Toshiba, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
A secret calculation device includes a memory and one or more processors coupled to the memory. The one or more processors are configured to: perform a first secret calculation operation on a first ciphertext obtained by encrypting input data according to a first homomorphic encryption method by using first homomorphic computation based on the first homomorphic encryption method to calculate a second ciphertext; convert, by using a ciphertext conversion method defined between the first homomorphic encryption method and a second homomorphic encryption method, the second ciphertext into a third ciphertext encrypted by the second homomorphic encryption method without decrypting the second ciphertext; and perform a second secret calculation operation on the third ciphertext by using second homomorphic computation based on the second homomorphic encryption method to calculate a fourth ciphertext.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile