Fujitsu Corporation

Socionext Inc.

Sanyo Electric Co., Ltd.

Hitachi, Ltd.

Fujitsu Semiconductor Limited

Renesas Technology Corp.

Victor Company of Japan, Limited

Pioneer Corporation

Sharp Corporation

Nippon Columbia Co., Ltd.

Jun Kamada

Seiji Goto

Taiji Tamiya

Takayuki Hasebe

Etsuo Ono

Yoshihiro Hori

Toshiaki Hioki

Takahisa Hatakeyama

Miwa Kanamori

Takeaki Anazawa

Seigou Kotani

Masayuki Hatanaka

Yasutsugu Kuroda

Shigeki Furuta

Tadaaki Tonegawa

Seigo Kotani

Takehiko Hayashi

Souichi Okada

Bintatsu Noda

Masanobu Yuhara

Takeo Ohishi

Naoya Torii

Tatsuya Hirai

Kenichiro Tada

Yuichi Kanai

Ryoji Ohno

Masatoshi Yoshida

Takahiro Nakai

Shoko Iwase

Taijji Tamiya

Junji Nakata

Toshihiro Hori

Seijo Goto

Taizou Kinoshita

Massayuki Hatanaka

The instruction code including an instruction code stored in the area where the encrypted instruction code is stored in a non-rewritable format is authenticated using a specific key which is specific to the core where the instruction code is executed or an authenticated key by a specific key to perform an encryption processing for the input and output data between the core and the outside.

Secure processor and a program for a secure processor

Encrypted music data and additional information necessary for accessing a server () are copied from a CD-ROM () onto a memory card (). The memory card () receives via a digital portable phone network the distribution of a contents decoding key (Kc) necessary for decoding encrypted music data and control information data (AC) for limiting the number of accesses to the memory card from the server ().

Data distributing system and recording medium used for it

A memory management unit manages a memory that stores a code, and sets that the memory that stores the code to be executed is valid to make a processor execute the code stores a verification key used to verify a validity of the code in a verification-key storing unit. When the code is stored in the memory and ready to be executed by the processor, the memory management unit verifies the validity of the code using the verification key stored in the verification-key storing unit and verification information assigned to the code. The memory management unit controls to set that the memory is valid when the validity is verified by the verifying unit, and not to set that the memory is valid when the validity is not verified by the verifying unit.

Memory management unit, code verifying apparatus, and code decrypting apparatus

A memory cardextracts a session key Ks from the data applied onto a data bus BSby carrying out a decryption process. An encryption processing unitencrypts a public encryption key KPcard() of memory cardbased on session key Ks, and applies the encrypted key to a server via data bus BS. A memoryreceives from a server data such as license key Kc, license ID data License-ID and user ID data User-ID encrypted with a public encryption key KPcard() differing for each memory card for storage, and receives encrypted content data [Dc]Kc encrypted with license key Kc from data bus BSfor storage.

Memory card

A contents utilization control apparatus includes an input unit for inputting a) contents with control module that consist of contents and a control module, and b) a license with control module that consists of a license prepared from contents utilization approval information and a control module. The control module in the contents with control module and the control module in the license with control module cooperate with each other to carry out a control relating to the utilization of the contents.

Method and apparatus for controlling contents utilization, and a computer product

A memory card includes a user ID hold unit holding user ID data provided to identify the user of the memory card, a first protection information memory unit holding first protection information restricting access to memory card, and a second protection information memory unit holding second protection information restricting access for each content data. Memory card refers to the user ID data to identify the user of the reproduction apparatus of interest and prohibits any unauthorized user from changing first and second protection information.

Recording device

Growing community of inventors

Kawasaki, Japan

Jun Kamada