Patent US2730617A successfully refreshed from Google Patents.
US6069647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conditional access and content security method
Assignee: Intel Corp
•
Filing: 1998-01-29
•
Granted: 2000-05-30
•
Expires: 2018-01-29
Abstract
Abstract A system featuring an interface unit connected to a programmable unit is described. The interface unit is capable of containing a time-sensitive key. The programmable unit is allowed to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained therein.
Inventors
- 👤 Robert R. Sullivan
- 👤 John M. Acken
- 👤 David W. Aucsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:19
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/25; H04N21/266; H04N7/00; H04N7/16; H04N7/167; H04N7/1675; H04N21/26606; H04N21/40; H04N21/43; H04N21/437; H04N21/45; H04N21/462; H04N21/4623; H04N21/80; H04N21/81; H04N21/8166; H04N21/8193
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
60 words
A system comprising: an interface unit to contain a time-sensitive key being a series of instructions distributed in space and able to be executed sequentially in time; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit.
Claim 2
Independent Claim
60 words
A system comprising: an interface unit to contain a time-sensitive key being a series of instructions distributed in space and able to be executed sequentially in time; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit.
Claim 3
Dependent Claim
29 words
The system of claim 1, wherein the time sensitive key comprises a plurality of bits forming a signal value in a binary format distributed in space and in time.
Claim 4
Independent Claim
71 words
A system comprising: an interface unit to contain a time sensitive key, the time-sensitive key is partitioned into a plurality of subparts, each subpart assigned to a subprogram of an authentication program able to be executed over time; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit.
Claim 5
Independent Claim
71 words
A system comprising: an interface unit to contain a time sensitive key, the time-sensitive key is partitioned into a plurality of subparts, each subpart assigned to a subprogram of an authentication program able to be executed over time; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit.
Claim 6
Independent Claim
70 words
A system comprising: an interface unit to contain a time-sensitive key; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit, the digital content received by the programmable unit further includes a revocation list indicative of whether the programmable unit is authorized to receive the digital content.
Claim 7
Independent Claim
70 words
A system comprising: an interface unit to contain a time-sensitive key; and a programmable unit coupled to the interface unit, the programmable unit to receive digital content from the interface unit upon establishing that the time-sensitive key is also contained within the programmable unit, the digital content received by the programmable unit further includes a revocation list indicative of whether the programmable unit is authorized to receive the digital content.
Claim 8
Dependent Claim
23 words
The system of claim 4, wherein the interface unit comprises one of a broadband receiver, a digital versatile disk player and a meter.
Claim 9
Dependent Claim
21 words
The system of claim 4, wherein the programmable unit comprises one of a computer, a set-top box and a digital television.
Claim 10
Dependent Claim
21 words
The system of claim 6, wherein the programmable unit includes a memory containing an executable program stored in a tamper-resistant format.
Claim 11
Dependent Claim
41 words
The system of claim 3, wherein the programmable unit includes a memory bank containing a program partitioned into a plurality of subroutines, each subpart of a plurality of subparts of the time-sensitive key corresponding to one of the plurality of subroutines.
Claim 12
Dependent Claim
25 words
The system of claim 8, wherein the programmable unit further includes at least one memory bank to contain a digital certificate and a digital signature.
Claim 13
Independent Claim
62 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the pre-transfer operations include verifying that a communication link between the interface unit and the programmable unit is secure.
Claim 14
Independent Claim
62 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the pre-transfer operations include verifying that a communication link between the interface unit and the programmable unit is secure.
Claim 15
Independent Claim
54 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit, the time sensitive key comprises a series of instructions periodically updated; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content.
Claim 16
Independent Claim
54 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit, the time sensitive key comprises a series of instructions periodically updated; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content.
Claim 17
Dependent Claim
27 words
The method of claim 11, wherein the series of instructions provides revocation information to identify at least one programmable unit precluded from further using the time-sensitive key.
Claim 18
Independent Claim
63 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the performing of the pre-transfer operations includes checking whether an authentication program loaded in the programmable unit has been modified.
Claim 19
Independent Claim
63 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the performing of the pre-transfer operations includes checking whether an authentication program loaded in the programmable unit has been modified.
Claim 20
Independent Claim
54 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the performing of the pre-transfer operations includes authenticating the programming unit.
Claim 21
Independent Claim
54 words
A method for hindering unauthorized access to digital content, the method comprising: periodically transmitting a time sensitive key between an interface unit and a programmable unit; and performing pre-transfer operations to ensure that the programmable unit is authorized to receive the digital content, the performing of the pre-transfer operations includes authenticating the programming unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-30 | 2003-11-29 | 2004-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-30 | 2007-11-29 | 2008-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-30 | 2011-11-29 | 2012-05-30 | $7700.00 | Window Closed / Lapsed |