P

Inventor

KAWAI YUTAKA

JP69 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI YUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

IBM

16 patents

MITSUBISHI ELECTRIC CORP

13 patents
US11824638B2Nov 21, 2023

Re-encryption device, method and computer readable medium to change the access range for ciphertext

MITSUBISHI ELECTRIC CORP2 citations72
US10673614B2Jun 2, 2020

Secret search system, management device, secret search method and computer readable medium

MITSUBISHI ELECTRIC CORP3 citations72
US11374742B2Jun 28, 2022

Conversion key generation device, ciphertext conversion device, privacy-preserving information processing system, conversion key generation method, ciphertext conversion method, and computer

MITSUBISHI ELECTRIC CORP2 citations71
US10872158B2Dec 22, 2020

Secret search system, secret search method, and computer readable medium

MITSUBISHI ELECTRIC CORP2 citations70
US11139952B2Oct 5, 2021

Homomorphic computation device, encryption system, and computer readable medium

MITSUBISHI ELECTRIC CORP4 citations69
US11349654B2May 31, 2022

Re-encryption key generation device, re-encryption device, re-encrypted ciphertext decryption device, and cryptographic system

MITSUBISHI ELECTRIC CORP0 citations62
US11005645B2May 11, 2021

Encryption device, encryption method, computer readable medium, and storage device

MITSUBISHI ELECTRIC CORP1 citations62
US10673627B2Jun 2, 2020

Encryption device, search device, computer readable medium, encryption method, and search method

MITSUBISHI ELECTRIC CORP1 citations62
US12542661B2Feb 3, 2026

Encryption apparatus, decryption apparatus, decryption-possible verification apparatus, cryptosystem, encryption method, and computer readable medium

MITSUBISHI ELECTRIC CORP0 citations52
US12393722B2Aug 19, 2025

Encrypted tag generation apparatus, searchable encryption system, encrypted tag generation method, and computer readable medium

MITSUBISHI ELECTRIC CORP0 citations52
US12261951B2Mar 25, 2025

Cryptographic system, encrypted data conversion apparatus, and computer readable medium

MITSUBISHI ELECTRIC CORP0 citations52
US12177346B2Dec 24, 2024

Re-encryption device, cryptographic system, re-encryption method, and computer readable medium

MITSUBISHI ELECTRIC CORP0 citations52
US9755823B2Sep 5, 2017

Cryptographic system, cryptographic method, and computer readable medium

MITSUBISHI ELECTRIC CORP0 citations52

MURATA MANUFACTURING CO

3 patents

NISSHIN STEEL CO LTD

3 patents

MITSUBISHI CHEM IND

3 patents

HOYA CORP

3 patents

DENSO CORP

3 patents

GOO CHEMICAL CO LTD

2 patents

(unassigned)

1 patent

KAWAI YUTAKA

1 patent

MITSUBISHI PLASTICS INC

1 patent

KAWASAKI STEEL CO

1 patent

Showing the top 50 of 69 patents by PatentIndex Score.