US5796824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage medium for preventing an irregular use by a third party
Assignee: Fujitsu Ltd
•
Filing: 1996-02-20
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Granted: 1998-08-18
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Expires: 2016-02-20
Abstract
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.
Inventors
- 👤 Takayuki Hasebe
- 👤 Ryota Akiyama
- 👤 Makoto Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:35
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/14; G06F12/1408; G06F21/00; G06F21/10; G06F21/101; G06F21/1014; G06F21/70; G06F21/78; G06F21/80; G06F21/805; G06F2221/00; G06F2221/21; G06F2221/2107; G06F2221/2129; G11; G11B; G11B20/00; G11B20/00086; G11B20/0021; G11B20/00217; G11B20/00253; G11B20/00347; Y; Y04; Y04S; Y04S40/00; Y04S40/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
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.
Claim 2
Dependent Claim
86 words
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.
Claim 3
Dependent Claim
18 words
A storage medium as claimed in claim 1, wherein the electronic data is software used for a computer.
Claim 4
Dependent Claim
16 words
A storage medium as claimed in claim 1, wherein the electronic data is electronically published data.
Claim 5
Dependent Claim
23 words
A storage medium as claimed in claim 1, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.
Claim 6
Dependent Claim
15 words
A storage medium as claimed in claim 1, wherein the storage medium is a CD-ROM.
Claim 7
Dependent Claim
82 words
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.
Claim 8
Dependent Claim
82 words
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.
Claim 9
Dependent Claim
18 words
A storage medium as claimed in claim 6, wherein the electronic data is software used for a computer.
Claim 10
Dependent Claim
16 words
A storage medium as claimed in claim 6, wherein the electronic data is electronically published data.
Claim 11
Dependent Claim
23 words
A storage medium as claimed in claim 6, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.
Claim 12
Dependent Claim
15 words
A storage medium as claimed in claim 6, wherein the storage medium is a CD-ROM.
Claim 13
Dependent Claim
68 words
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.
Claim 14
Dependent Claim
68 words
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.
Claim 15
Dependent Claim
18 words
A storage medium as claimed in claim 11, wherein the electronic data is software used for a computer.
Claim 16
Dependent Claim
16 words
A storage medium as claimed in claim 11, wherein the electronic data is electronically published data.
Claim 17
Dependent Claim
31 words
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.
Claim 18
Dependent Claim
23 words
A storage medium as claimed in claim 11, wherein the storage medium is an optical magnetic disk, or a partially embossed optical disk.
Claim 19
Dependent Claim
15 words
A storage medium as claimed in claim 11, wherein the storage medium is a CD-ROM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-17 | 2002-02-16 | 2002-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-17 | 2006-02-16 | 2006-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-17 | 2010-02-16 | 2010-08-18 | $7700.00 | Window Closed / Lapsed |