Inventor

IWAMURA KEIICHI

JP90 patents

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

IWAMURA KEIICHI

CANON KK

Electronic watermarking method, electronic information distribution system, image filing apparatus and storage medium therefor

Electronic watermark system electronic information distribution system and image filing apparatus

Image transmission apparatus, image transmission system, and communication apparatus

Accounting device, communicating apparatus, and communication system

Image processing apparatus for determining specific images

Embedding information in digital image data

Data processing apparatus and method and storage medium

Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method

Information processing apparatus, method and memory medium therefor

Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof

Key management method, encryption system, and sharing digital signature system which have hierarchies

Encryption apparatus, communication system using the same and method therefor

Data processing apparatus and method, and storage medium

Data processing apparatus and method and storage medium

System for enabling access to a body of information based on a credit value, and system for allocating fees

Accounting apparatus, information receiving apparatus, and communication system

Image transmission system with billing based on the kind of MPEG frame transmitted

Encryption device and communication apparatus using same

Apparatus for multiplying long integers

Method of and apparatus for encryption and decryption of communication data

Extracting embedded information from digital image data

Data processing apparatus and method, and storage medium therefor

Moving image generation apparatus, moving image playback apparatus, their control method, and storage medium

Apparatus, computer medium, and method for embedding and extracting a first and second data into a watermark

Image processor and image processing method

Data processing apparatus and method, and memory medium

Metering the flow of electronic information

Management system and terminal apparatus to manage and control distribution and use of software and the like

Electronic credit system and communication apparatus

Data processing apparatus and method and storage medium

Management system and terminal apparatus to manage and control distribution and use of software and the like

Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center

Pseudo-random number generator and communication system employing the same

GMD decoding apparatus and a method therefor

Method for sharing secret information and performing certification in a communication system that has a plurality of information processing apparatuses

Polynominal-set deriving apparatus and method

Calculating apparatus and method of encrypting/decrypting communication data by using the same

Image processing apparatus and method

Information processing apparatus, information processing system, information processing method, storage medium and program

Image processor and image processing method

Image processing apparatus and method and storage medium

Image processing apparatus and method, and storage medium

Accounting in an image transmission system based on a transmission mode and an accounting mode based on the transmission mode

Error correction method including erasure correction, and apparatus therefor

Apparatus for encoding and decoding reed-solomon code

Signal processing apparatus for correcting decoding errors

Image processing apparatus and method and storage medium

Image processor, method thereof, computer program, and computer readable storage medium

Information processing apparatus, method therefor, computer program, and computer-readable storage medium

FUJITSU LTD

Character input device