Inventor

TATEBAYASHI MAKOTO

JP93 patents

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

TATEBAYASHI MAKOTO

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Digital content protection system

Production protection system dealing with contents that are digital production

Semiconductor memory card

Apparatus and method for preventing unauthorized use of information recorded on an information recording medium

Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus

Device authentication and encrypted communication system offering increased security

Encryption apparatus for ensuring security in communication between devices

Method for generating and verifying electronic signatures and privacy communication using elliptic curves

Public key cryptosystem with an elliptic curve

Storage medium and contents protection method using the storage medium

Data transmitter, data transmitting method, data receiver, information processor, and information recording medium

Communication device which performs two-way encryption authentication in challenge response format

Semiconductor memory card, data reading apparatus and data reading/reproducing apparatus

Cryptographic apparatus for performing cryptography on a specified area of content data

Production protection system dealing with contents that are digital production

Semiconductor memory card, data reading apparatus, and data reading/reproducing apparatus

Revocation information updating method, revocation information updating apparatus and storage medium

Pay information providing system for descrambling information from plural sources and rescrambling the information before sending to a terminal or terminals

Device authentication system which allows the authentication function to be changed

Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded

Apparatus and method for data encryption with block selection keys and data encryption keys

Method of privacy communication using elliptic curves

Method for generating a public key

Data converter and method thereof

Encryption system for distributing a common crypt key

Personal authentication method

Cryptographic key distribution method and system

Information recording medium for recording a scrambled part of content information, and method and apparatus for reproducing information recorded therein

Data protection system that protects data by encrypting the data

Public key certificate revocation list generation apparatus, revocation judgement apparatus, and authentication system

Digital content protection system

Digital work protection system, key management apparatus, and user apparatus

Service providing system in which services are provided from service provider apparatus to service user apparatus via network

Method for authentication between apparatuses using challenge and response system

Encryption system capable of specifying a type of an encrytion device that produced a distribution medium

Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded

Encrypted communication system that limits the damage caused when a secret key has been leaked

One-way data conversion apparatus and device authentication system

Authentication system and key registration apparatus

Contents management method, content management apparatus, and recording medium

Mutual authentication method, recording apparatus, reproducing apparatus, and recording medium

Revocation information updating method, revocation informaton updating apparatus and storage medium

Block cipher using key data merged with an intermediate block generated from a previous block

PANASONIC CORP

Information input/output system, key management device, and user device

Copyright protection system, recording device, and reproduction device

Encryption apparatus, decryption apparatus, secret key generation apparatus, and copyright protection system

Semiconductor memory card and data reading apparatus, and data reading/reproducing apparatus

Encrypted communication system and communication device

Key agreement system, shared-key generation apparatus, and shared-key recovery apparatus

TOSHIBA KK

Method of encryption and decryption with block number dependant key sets, each set having a different number of keys