Title:
【発明の名称】読取を制御するためのマイクロプロセッサを有するコンピュータ読取可能媒体及びこのような媒体と通信を行う構成とされたコンピュータ
Document Type and Number:
Japanese Patent JP2003516600
Kind Code:
A
Abstract:
Computer-readable medium provided with a memory area ( 2; 26, 28 ) for storing data and a distinct microprocessor ( 3 ) having a communication interface ( 4 ), a memory unit ( 7 ) and a processor unit ( 5 ) connected to both the communication interface ( 4 ) and the memory unit ( 7 ). The data may include a first data portion which is arranged to be read and decrypted by a computer arrangement ( 11 ) provided at least one condition is met, and the microprocessor ( 3 ) being arranged to generate at least one cryptographic key once the condition is met that is necessary to decrypt the data. The invention is also directed to a computer arrangement arranged to communicate with such a medium.
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Inventors:
De Jong, Eduard Karel
Application Number:
JP2001543730A
Publication Date:
May 13, 2003
Filing Date:
December 07, 1999
Export Citation:
Assignee:
Sun Microsystems, Inc.
International Classes:
G06K19/00; G06F21/10; G06F21/72; G06F21/80; G06K17/00; G06K19/06; G06K19/10; G06Q50/00; G11B20/00; G11B20/10; G11B23/30; H04L9/08; H04L9/32; (IPC1-7): G11B23/30; G06F17/60; G06K17/00; G06K19/00; G06K19/06; G06K19/10; G11B20/10; H04L9/08; H04L9/32
Domestic Patent References:
| JPH11161551A | 1999-06-18 | |||
| JPH11120740A | 1999-04-30 | |||
| JPH0765534A | 1995-03-10 | |||
| JPH11250192A | 1999-09-17 | |||
| JPH10241290A | 1998-09-11 |
Foreign References:
| WO1997041562A1 | 1997-11-06 |
Attorney, Agent or Firm:
Masaaki Kobashi