Patent US6424715B1 successfully refreshed from Google Patents.
US6424715B1
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Digital content management system and apparatus
Assignee: Piracy Protection LLC
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Filing: 1997-06-03
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Granted: 2002-07-23
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Expires: 2017-06-03
Abstract
Abstract There are provided a digital content management apparatus which further embodies a digital content management apparatus used with a user terminal, and a system which protects the secrets of a digital content. The system and the apparatus are a real time operating system using a microkernel, which is incorporated in the digital content management apparatus as an interruption process having high priority. When a user uses the digital content, whether there is an illegitimate usage or not, is watched by interrupting the usage process. In the case where illegitimate usage is carried out, a warning is given or the usage is stopped. The decryption/re-encryption functions of the digital content management apparatus having the decryption/re-encryption functions are not restricted to the inside of the user apparatus. By providing the decryption/re-encryption functions between the networks, the exchange of secret information between different networks is secured. By using this apparatus for converting a crypt algorithm, information exchange is made possible between systems which adopt different algorithms.
Inventors
- 👤 Makoto Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:49
CPC Classifications
G; G06; G06Q; G06Q20/00; G06F; G06F21/00; G06F21/10; G06F21/109; G06Q20/02; G06Q20/04; G06Q20/06; G06Q20/08; G06Q20/12; G06Q20/123; G06Q20/1235; G06Q20/30; G06Q20/36; G06Q20/363; G06Q20/38; G06Q20/382; G06Q20/3823; G06Q20/3829; G07; G07F; G07F7/00; G07F7/08; G07F7/0866; G07F7/10; G07F7/1016; H; H04; H04L; H04L63/00; H04L63/04; H04L63/0428; H04L63/0442; H04L63/0464; H04L63/06; H04L63/062; H04L63/12; H04L63/126; H04N; H04N21/00; H04N21/20; H04N21/25; H04N21/254; H04N21/2541; H04N21/40; H04N21/41; H04N21/414; H04N21/4147; H04N21/43; H04N21/436; H04N21/4367; H04N21/442; H04N21/44204; H04N21/44236; H04N21/443; H04N21/45; H04N21/462; H04N21/4627; H04N21/47; H04N21/488; H04N21/4882; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; H04N7/00; H04N7/16; H04N7/162; H04N7/165; H04N7/167; H04N7/1675; G06F2211/00; G06F2211/007; G06F2211/008; G06F2221/00; G06F2221/21; G06F2221/2107
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A digital content management system which uses digital contents, said system having: a server in which a watch program which watches illegitimate usage of the digital content is stored, said watch program having a high interruption priority, and being constituted as a real time operating system using a micro-kernel, in a network.
Claim 2
Dependent Claim
52 words
A digital content management system which uses digital contents, said system having: a server in which a watch program which watches illegitimate usage of the digital content is stored, said watch program having a high interruption priority, and being constituted as a real time operating system using a micro-kernel, in a network.
Claim 3
Dependent Claim
159 words
A digital content management apparatus used with a user terminal which uses a digital content, said digital content management apparatus comprising a microprocessor, a microprocessor bus, a read-only semiconductor memory, an electrically erasable and programmable read-only memory, and a read/write memory, wherein: said microprocessor, said read-only semiconductor memory, said electrically erasable and programmable read-only memory and said read/write memory are connected to said microprocessor bus, and a system bus of said user terminal is capable of being connected to said microprocessor bus; a crypt algorithm and a watch program watching illegitimate usage of the digital content, are components of an operating system stored in said read-only semiconductor memory, said watching program having a high interruption priority; and a user's first public-key, a user's first private-key, a user's second public-key, a user's second private-key, a digital content management program, a database's first secret-key, a database's second secret-key and copyright information are stored in said electrically erasable and programmable read-only memory.
Claim 4
Dependent Claim
159 words
A digital content management apparatus used with a user terminal which uses a digital content, said digital content management apparatus comprising a microprocessor, a microprocessor bus, a read-only semiconductor memory, an electrically erasable and programmable read-only memory, and a read/write memory, wherein: said microprocessor, said read-only semiconductor memory, said electrically erasable and programmable read-only memory and said read/write memory are connected to said microprocessor bus, and a system bus of said user terminal is capable of being connected to said microprocessor bus; a crypt algorithm and a watch program watching illegitimate usage of the digital content, are components of an operating system stored in said read-only semiconductor memory, said watching program having a high interruption priority; and a user's first public-key, a user's first private-key, a user's second public-key, a user's second private-key, a digital content management program, a database's first secret-key, a database's second secret-key and copyright information are stored in said electrically erasable and programmable read-only memory.
Claim 5
Dependent Claim
15 words
The digital content management apparatus according to claim 2 is configured on an IC chip.
Claim 6
Dependent Claim
15 words
The digital content management apparatus according to claim 2 is configured in an IC card.
Claim 7
Dependent Claim
15 words
The digital content management apparatus according to claim 2 is configured in a PC card.
Claim 8
Dependent Claim
15 words
The digital content management apparatus according to claim 2 is configured in an inserted board.
Claim 9
Dependent Claim
156 words
A digital content management apparatus which protects the secrets of a digital content in a network, said digital content management apparatus comprising a microprocessor, a microprocessor bus, a read-only semiconductor memory, an electrically erasable and programmable read-only memory and a read/write memory, wherein: said microprocessor, said read-only semiconductor memory, said electrically erasable and programmable read-only memory and said read/write memory are connected to said microprocessor bus, and a system bus of said user terminal is capable of being connected; a crypt algorithm and a watch program watching illegitimate usage of the digital content, are components of an operating system stored in said read-only semiconductor memory, said watching program having a high interruption priority; and a user's first public-key, a user's first private-key, a user's second public-key, a user's second private-key, a digital content management program, a database's first secret-key, a database's second secret-key and copyright information are stored in said electrically erasable and programmable read-only memory.
Claim 10
Dependent Claim
156 words
A digital content management apparatus which protects the secrets of a digital content in a network, said digital content management apparatus comprising a microprocessor, a microprocessor bus, a read-only semiconductor memory, an electrically erasable and programmable read-only memory and a read/write memory, wherein: said microprocessor, said read-only semiconductor memory, said electrically erasable and programmable read-only memory and said read/write memory are connected to said microprocessor bus, and a system bus of said user terminal is capable of being connected; a crypt algorithm and a watch program watching illegitimate usage of the digital content, are components of an operating system stored in said read-only semiconductor memory, said watching program having a high interruption priority; and a user's first public-key, a user's first private-key, a user's second public-key, a user's second private-key, a digital content management program, a database's first secret-key, a database's second secret-key and copyright information are stored in said electrically erasable and programmable read-only memory.
Claim 11
Dependent Claim
15 words
The digital content management apparatus according to claim 7 is configured on an IC chip.
Claim 12
Dependent Claim
15 words
The digital contents management apparatus according to claim 7 is configured in an IC card.
Claim 13
Dependent Claim
15 words
The digital contents management apparatus according to claim 7 is configured in a PC card.
Claim 14
Dependent Claim
15 words
The digital contents management apparatus according to claim 7 is configured in an inserted board.
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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) | 2005-07-22 | 2006-01-21 | 2006-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-22 | 2010-01-21 | 2010-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-22 | 2014-01-21 | 2014-07-23 | $7700.00 | Window Closed / Lapsed |