Storage medium for preventing an irregular use by a third party

• US 5,796,824 A
• Filed: 02/20/1996
• Issued: 08/18/1998
• Est. Priority Date: 03/16/1992
• Status: Expired

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Hasebe, Takayuki, Yoshioka, Makoto, Akiyama, Ryota
• Primary Examiner(s): Barron, Jr., Gilberto
• Application Number:
  US08/603,760
• Time in Patent Office: 910 Days
• Field of Search: 380/4, 380/25
• US Class Current: 705/51
• CPC Class Codes: G06F 12/1408 by using cryptography for digital transmission H04L9/00
• CPC Class Codes: G06F 21/1014 to tokens
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 21/805 using a security table for the storage sub-system
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2129 Authenticate client device independently of the user
• CPC Class Codes: G11B 20/00347 wherein the medium identifier is used as a key
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A storage medium stores encrypted electronic data, a medium personal number which is unique for each storage medium and encrypted permission information. At least the medium personal number is written onto the storage medium in an un-rewritable form which a user computer cannot rewrite.

Claims

1. A storage medium accessed by a vendor computer and user computer, said storage medium for storing information readable by said user computer, said storage medium comprising:

encrypted electronic data; and

a medium personal number which is unique for each storage medium, wherein at least the medium personal number is written onto the storage medium in an un-rewritable form which said user computer cannot rewrite, and said medium personal number is used for generating a decryption key for decrypting said encrypted electronic data in said user computer.

2. A storage medium as claimed in claim 1, wherein the electronic data is software used for a computer.

3. A storage medium as claimed in claim 1, wherein the electronic data is electronically published data.

4. A storage medium as claimed in claim 1, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.

5. A storage medium as claimed in claim 1, wherein the storage medium is a CD-ROM.

6. A storage medium accessed by a vendor computer and a user computer, said storage medium for storing information readable by said user computer, said storage medium comprising:

encrypted electronic data; and

a medium personal number which is unique for each storage medium, wherein at least the medium personal number is written onto the storage medium in an un-rewritable form which said user computer cannot rewrite, and said medium personal number is used for generating an encrypted permission information in said vendor computer.

7. A storage medium as claimed in claim 6, wherein the electronic data is software used for a computer.

8. A storage medium as claimed in claim 6, wherein the electronic data is electronically published data.

9. A storage medium as claimed in claim 6, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.

10. A storage medium as claimed in claim 6, wherein the storage medium is a CD-ROM.

11. A storage medium accessed by a vendor computer and a user computer, said storage medium for storing information readable by said user computer, said storage medium comprising:

encrypted electronic data;

a medium personal number which is unique for each storage medium; and

encrypted permission information,

wherein at least the medium personal number is written onto the storage medium in an unrewritable form which a user computer cannot rewrite.

12. A storage medium as claimed in claim 11, wherein the electronic data is software used for a computer.

13. A storage medium as claimed in claim 11, wherein the electronic data is electronically published data.

14. A storage medium as claimed in claim 11, wherein the storage medium stores a plurality of encrypted electronic data, and each encrypted electronic data has a different electronic data decrypting key.

15. A storage medium as claimed in claim 11, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.

16. A storage medium as claimed in claim 11, wherein the storage medium is a CD-ROM.