Inventor

MURATANI HIROFUMI

JP38 patents

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

MURATANI HIROFUMI

TOSHIBA KK

Software use method control system

Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unit

Digital watermark embedding device, digital watermark detection device, digital information distribution device, and, storage medium

Encryption apparatus, decryption apparatus, expanded key generating apparatus and method therefor, and recording medium

Multicast communication system allows user to join or leave multicast groups and specify communication quality using easily comprehensible and operable user terminal display

Digital watermark embedding device, digital watermark detection device and recording medium recording computer readable program for realizing functions of two devices

Communication navigation system which easily finds person who is interested in the same topic

High speed logic simulation system using time division emulation suitable for large scale logic circuits

Digital watermark embedding method and apparatus, and digital watermark

Digital watermark embedding method and apparatus, and digital watermark

Encryption apparatus and method, and decryption apparatus and method based on block encryption

Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unit

Electronic watermark detection apparatus and method

Digital watermark embedding apparatus, method and program, and digital watermark detection apparatus, method and program

Encryption apparatus and method, and decryption apparatus and method based on block encryption

Encryption apparatus and method, and decryption apparatus and method based on block encryption

Digital watermark detecting device and method thereof

Digital watermark embedding method, digital watermark embedding apparatus, digital watermark detecting method, and digital watermark detecting apparatus

Authentication device, output device, verification device and input device

Digital watermark embedding apparatus, digital watermark detecting apparatus, digital watermark embedding method, digital watermark detecting method and computer program product

Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unit

Rendering device, recording device, copy control method, and program

Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and program

Identification information embedding apparatus and identification information analysis apparatus

Digital watermark detecting device and method thereof

Exponentiation calculation apparatus and method for calculating square root in finite extension field

Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and program

Electronic watermark detection apparatus and method

YONEMURA TOMOKO

Arithmetic device

Representation converting apparatus, arithmetic apparatus, representation converting method, and computer program product

Exponentiation calculation apparatus and method for calculating square root in finite extension field

Public key cryptography computing device

DIGITAL VISION LAB CORP

Apparatus and method for receiving and decrypting encrypted data and protecting decrypted data from illegal use

Information distribution system and billing system used for the information distribution system

MURATANI HIROFUMI

Apparatus for performing data compression processing using algebraic torus

Apparatus and computer program product for performing data compression processing using algebraic torus

HANATANI YOSHIKAZU

Decompressing apparatus and compressing apparatus

ISOGAI TAICHI

Arithmetic device, method, and program product