US5353353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repeater security system
Assignee: GlobalFoundries Inc
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Filing: 1993-04-26
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Granted: 1994-10-04
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Expires: 2013-04-26
Abstract
Abstract A system is provided for use in a network providing security to ensure the prevention of unauthorized receipt of data. The system utilizes a jamming sequence to prevent unauthorized ports from receiving certain data. Repeaters utilized in the network are provided with the capability to detect a particular data sequence to provide the improved features.
Inventors
- 👤 Nader Vijeh
- 👤 William Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:41
CPC Classifications
H; H04; H04L; H04L63/00; H04L63/02; H04L63/0227; G; G11; G11C; G11C7/00; G11C7/10; G11C7/1078; H04L12/00; H04L12/02; H04L12/22; H04L12/28; H04L12/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A system for providing security for a network that includes a plurality of ports for transmitting and receiving data, the data including a bit that indicates the start of a data stream and a bit corresponding to each port that is to receive the data the system comprising; a plurality of disrupt circuits means coupled to the plurality of ports, there being one disrupt circuit means for each port, each of the disrupt means being coupled in a serial fashion; a detect circuit means coupled between a first disrupt circuit means and a last disrupt circuit means to detect when the start bit has reached to last disrupt circuit means; and means for providing a jam sequence of data that will block a data bitstream from reaching a particular port responsive to the detect circuit means.
Claim 2
Independent Claim
136 words
A system for providing security for a network that includes a plurality of ports for transmitting and receiving data, the data including a bit that indicates the start of a data stream and a bit corresponding to each port that is to receive the data the system comprising; a plurality of disrupt circuits means coupled to the plurality of ports, there being one disrupt circuit means for each port, each of the disrupt means being coupled in a serial fashion; a detect circuit means coupled between a first disrupt circuit means and a last disrupt circuit means to detect when the start bit has reached to last disrupt circuit means; and means for providing a jam sequence of data that will block a data bitstream from reaching a particular port responsive to the detect circuit means.
Claim 3
Dependent Claim
28 words
The system of claim 1 in which each of the disrupt circuit means includes a shift register, each of the shift registers being chained in a serial manner.
Claim 4
Dependent Claim
41 words
The system of claim 2 in which each of the disrupt circuit means includes a latch for receiving a bit of from the data bitstream which provides an indication of whether the data provided to a particular port should be disrupted.
Claim 5
Dependent Claim
17 words
The system of claim 3 in which each of the latches correspond to each of the ports.
Claim 6
Dependent Claim
77 words
The system of claim 4 in which the detect circuit means comprises; means for detecting a start bit; means coupled to the detecting means for determining whether the start bit has reached to one bit shift register; and means responsive to the start bit reaching the last one bit shift register for asserting a signal that latches bits from the plurality of one bit shift register to the latch to indicate whether a port should be disrupted.
Claim 7
Dependent Claim
27 words
The system of claim 5 in which the asserting means provides a strobe signal to the one bit shift registers that latches the data into the latches.
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) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |