US5517568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of detecting unauthorized use of a wireless communication channel
Assignee: Google Technology Holdings LLC
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Filing: 1994-04-21
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Granted: 1996-05-14
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Expires: 2014-04-21
Abstract
Abstract A method for detecting unauthorized use of a communication unit (102) in a secure wireless communication system includes monitoring (201) a wireless communication channel (103) presently supporting a secure communication. It is determined (202) whether the secure communication is encrypted with active system encryption parameters. When the secure communication is not encrypted with the active system encryption parameters, a communication unit (102) involved in the secure communication is indicated (203) as a potential unauthorized communication unit (102). The steps of monitoring, determining, and indicating are performed by a communication unit (102) or a central controller (101).
Inventors
- 👤 Gary W. Grube
- 👤 Timothy W. Markison
- 👤 Susan L. Lukasik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:05
CPC Classifications
H; H04; H04K; H04K1/00; H04W; H04W12/00; H04W12/03; H04W12/037; H04W12/12; H04W12/121; H04W12/122; H04W12/04; H04W12/043; H04W12/0433
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
75 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, comprising the steps of: a) monitoring a wireless communication channel presently supporting a secure communication; b) determining whether the secure communication is encrypted with active system encryption parameters; and c) when the secure communication is not encrypted with the active system encryption parameters, indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit.
Claim 2
Independent Claim
75 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, comprising the steps of: a) monitoring a wireless communication channel presently supporting a secure communication; b) determining whether the secure communication is encrypted with active system encryption parameters; and c) when the secure communication is not encrypted with the active system encryption parameters, indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein the steps of monitoring, determining, and indicating are performed by a communication unit.
Claim 4
Dependent Claim
19 words
The method of claim 1, wherein the steps of monitoring, determining, and indicating are performed by a central controller.
Claim 5
Dependent Claim
25 words
The method of claim 1, wherein the step of indicating further comprises sending an indication of the potential unauthorized communication unit to a system manager.
Claim 6
Dependent Claim
27 words
The method of claim 4, wherein the system manager determines if system encryption parameters used by the potential unauthorized communication unit match previously used system encryption parameters.
Claim 7
Dependent Claim
17 words
The method of claim 1, wherein the active system encryption parameters include at least one encryption key.
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein the active system encryption parameters include at least one encryption algorithm.
Claim 9
Dependent Claim
37 words
The method of claim 1, wherein the step of determining comprises the step of determining if an encryption key used by the potential unauthorized communication unit matches an active encryption key in the secure wireless communication system.
Claim 10
Dependent Claim
37 words
The method of claim 1, wherein the step of determining comprises the step of determining if an encryption algorithm used by the potential unauthorized communication unit matches an active encryption algorithm in the secure wireless communication system.
Claim 11
Dependent Claim
34 words
The method of claim 1, wherein the step of indicating further comprises the step of sending at least one new active system encryption parameter to authorized communication units in the secure wireless communication system.
Claim 12
Independent Claim
103 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, comprising the steps of: a) monitoring a wireless communication channel presently supporting a secure communication; b) determining whether the secure communication is encrypted with active system encryption parameters; c) when the secure communication is not encrypted with the active system encryption parameters, indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit; and d) sending, to the potential unauthorized communication unit, a message encoded with the active system parameters to check if the potential unauthorized communication unit decodes the message properly.
Claim 13
Independent Claim
103 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, comprising the steps of: a) monitoring a wireless communication channel presently supporting a secure communication; b) determining whether the secure communication is encrypted with active system encryption parameters; c) when the secure communication is not encrypted with the active system encryption parameters, indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit; and d) sending, to the potential unauthorized communication unit, a message encoded with the active system parameters to check if the potential unauthorized communication unit decodes the message properly.
Claim 14
Independent Claim
65 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, the method comprising the steps of: a) monitoring a wireless communication channel currently supporting a secure communication; b) determining whether the secure communication is encrypted with an inactive system encryption parameter; and c) indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit.
Claim 15
Independent Claim
65 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, the method comprising the steps of: a) monitoring a wireless communication channel currently supporting a secure communication; b) determining whether the secure communication is encrypted with an inactive system encryption parameter; and c) indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit.
Claim 16
Dependent Claim
19 words
The method of claim 12, wherein the steps of monitoring, determining, and indicating are performed by a communication unit.
Claim 17
Dependent Claim
19 words
The method of claim 12, wherein the steps of monitoring, determining, and indicating are performed by a central controller.
Claim 18
Dependent Claim
25 words
The method of claim 12, wherein the step of indicating further comprises sending an indication of the potential unauthorized communication unit to a system manager.
Claim 19
Dependent Claim
27 words
The method of claim 15, wherein the system manager determines if system encryption parameters used by the potential unauthorized communication unit match previously used system encryption parameters.
Claim 20
Dependent Claim
17 words
The method of claim 12, wherein the inactive system encryption parameters include at least one encryption key.
Claim 21
Dependent Claim
17 words
The method of claim 12, wherein the inactive system encryption parameters include at least one encryption algorithm.
Claim 22
Dependent Claim
37 words
The method of claim 12, wherein the step of determining comprises the step of determining if an encryption key used by the potential unauthorized communication unit matches an active encryption key in the secure wireless communication system.
Claim 23
Dependent Claim
37 words
The method of claim 12, wherein the step of determining comprises the step of determining if an encryption algorithm used by the potential unauthorized communication unit matches an active encryption algorithm in the secure wireless communication system.
Claim 24
Dependent Claim
34 words
The method of claim 12, wherein the step of indicating further comprises the step of sending at least one new active system encryption parameter to authorized communication units in the secure wireless communication system.
Claim 25
Independent Claim
92 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, the method comprising the steps of: a) monitoring a wireless communication channel currently supporting a secure communication; b) determining whether the secure communication is encrypted with an inactive system encryption parameter; c) indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit; and d) sending, to the potential unauthorized communication unit, a message encoded with active system parameters to check if the potential unauthorized communication unit decodes the message properly.
Claim 26
Independent Claim
92 words
A method for detecting unauthorized use of a communication unit in a secure wireless communication system, the method comprising the steps of: a) monitoring a wireless communication channel currently supporting a secure communication; b) determining whether the secure communication is encrypted with an inactive system encryption parameter; c) indicating that a communication unit involved in the secure communication is a potential unauthorized communication unit; and d) sending, to the potential unauthorized communication unit, a message encoded with active system parameters to check if the potential unauthorized communication unit decodes the message properly.
Claim 27
Dependent Claim
62 words
A secure communication monitor comprising: a wireless receiver that monitors a wireless communication channel currently supporting a secure communication; a database containing active system encryption parameters and previously used system encryption parameters; and a processing unit, operating together with the wireless receiver and the database, wherein the processing unit determines whether the secure communication unit is utilizing the active system encryption parameters.
Claim 28
Dependent Claim
62 words
A secure communication monitor comprising: a wireless receiver that monitors a wireless communication channel currently supporting a secure communication; a database containing active system encryption parameters and previously used system encryption parameters; and a processing unit, operating together with the wireless receiver and the database, wherein the processing unit determines whether the secure communication unit is utilizing the active system encryption parameters.
Claim 29
Dependent Claim
25 words
The secure communication monitor of claim 23, wherein the processing unit determines which previously used system encryption parameters are used by the secure communication unit.
Claim 30
Dependent Claim
33 words
The secure communication monitor of claim 24, wherein the processing unit generates an indication that the secure communication unit is using previously used system encryption parameters and is a potential unauthorized communication unit.
Claim 31
Dependent Claim
18 words
The secure communication monitor of claim 24, wherein the secure communication monitor is coupled to a system manager.
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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) | 1999-05-14 | 1999-11-13 | 2000-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-14 | 2003-11-13 | 2004-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-14 | 2007-11-13 | 2008-05-14 | $7700.00 | Window Closed / Lapsed |