US6064737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-piracy system for wireless telephony
Assignee: Digimarc Corp
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Filing: 1998-10-13
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Granted: 2000-05-16
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Expires: 2018-10-13
Abstract
Abstract A method and system are described for reducing the theft of wireless telephony services, such as cellular systems and PCS systems, altering voice data to steganographically embed verification data therein. The verification data comprises a plurality of symbols which are steganographically detected at the carrier facility to confirm authorized use of the wireless device.
Inventors
- 👤 Geoffrey B. Rhoads
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:01
CPC Classifications
G; G06; G06T; G06T1/00; G06T1/0021; G06T1/005; G06T1/0064; G06F; G06F21/00; G06F21/10; G06F21/16; G06F21/30; G06F21/44; G06F21/445; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06037; G06K19/06046; G06K19/08; G06K19/10; G06K19/14; G06K7/00; G06K7/10; G06K7/14; G06K7/1404; G06K7/1408; G06K7/1417; G06K7/1439; G06K7/1447; G06Q; G06Q20/00; G06Q20/30; G06Q20/306; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/401; G06Q20/4014; G06Q20/40145; G07; G07D; G07D7/00; G07D7/003; G07D7/0034; G07D7/004; G07F; G07F17/00; G07F17/16; G07F7/00; G07F7/08; G07F7/086; G07F7/10; G07F7/1008; G10; G10L; G10L19/00; G10L19/018; H; H04; H04L; H04L63/00; H04L63/04; H04L63/0428; H04L9/00; H04L9/06; H04L9/065; H04L9/0656; H04L9/0662; H04M; H04M1/00; H04M1/66; H04N; H04N1/00; H04N1/00002; H04N1/00005; H04N1/00026; H04N1/00037; H04N1/00071; H04N1/00074; H04N1/00079; H04N1/00838; H04N1/0084; H04N1/00843; H04N1/00846; H04N1/00856; H04N1/00875; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32154; H04N1/3216; H04N1/32203; H04N1/32208; H04N1/32251; H04N1/32288; H04N1/32352; H04W; H04W12/00; H04W12/06; H04W12/12; H04W12/126; G06F2221/00; G06F2221/21; G06F2221/2129; G06K2019/06215; G06K2019/06253; G06T2201/00; G06T2201/005; G06T2201/0081; G11; G11B; G11B20/00; G11B20/00086; G11B20/00884; G11B20/00891; H04M3/00; H04M3/38; H04N2201/00; H04N2201/0077; H04N2201/0091; H04N2201/32; H04N2201/3201; H04N2201/3204; H04N2201/3205; H04N2201/3225; H04N2201/3233; H04N2201/3269; H04N2201/327; H04N2201/3274; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W88/00; H04W88/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
In a method of detecting fraud in a wireless communications system, the system including a carrier facility and a plurality of wireless communications devices, each wireless communications device providing identification data to the carrier facility used by said facility in detecting fraudulent use of the device, the identification data comprising a plurality of symbols, each wireless device sending voice data corresponding to a user's voice to the carrier facility, an improvement comprising: altering the voice data to steganographically embed verification data therein, said verification data comprising a plurality of symbols; steganographically detecting said verification data from the voice data at the carrier facility, and using said detected verification data to confirm authorized use of the wireless device, wherein the user's voice data serves as the carrier of the verification data from the wireless device to the carrier facility.
Claim 2
Dependent Claim
138 words
In a method of detecting fraud in a wireless communications system, the system including a carrier facility and a plurality of wireless communications devices, each wireless communications device providing identification data to the carrier facility used by said facility in detecting fraudulent use of the device, the identification data comprising a plurality of symbols, each wireless device sending voice data corresponding to a user's voice to the carrier facility, an improvement comprising: altering the voice data to steganographically embed verification data therein, said verification data comprising a plurality of symbols; steganographically detecting said verification data from the voice data at the carrier facility, and using said detected verification data to confirm authorized use of the wireless device, wherein the user's voice data serves as the carrier of the verification data from the wireless device to the carrier facility.
Claim 3
Dependent Claim
40 words
The method of claim 1 in which the verification data and the identification data include a plurality of shared symbols in common, and the method includes checking the identification data and the verification data for correspondence between said shared symbols.
Claim 4
Dependent Claim
36 words
The method of claim 1 which includes modulating an intermediate carrier signal with data corresponding to the user's voice, and in which said altering alters said intermediate carrier signal to steganographically embed the verification data therein.
Claim 5
Dependent Claim
14 words
The method of claim 1 in which the voice data is an analog signal.
Claim 6
Dependent Claim
14 words
The method of claim 1 in which the voice data is a digital signal.
Claim 7
Dependent Claim
73 words
In a wireless personal communications transceiver, said transceiver including a microphone coupled to a transmitter and a receiver coupled to a speaker, the transceiver including means for transmitting a wireless signal modulated with a voice signal corresponding to a user's voice, an improvement comprising means for altering said voice signal to steganographically embed a multi-symbol auxiliary data string therein, wherein transmission of the wireless voice signal also conveys the auxiliary signal hidden therein.
Claim 8
Dependent Claim
73 words
In a wireless personal communications transceiver, said transceiver including a microphone coupled to a transmitter and a receiver coupled to a speaker, the transceiver including means for transmitting a wireless signal modulated with a voice signal corresponding to a user's voice, an improvement comprising means for altering said voice signal to steganographically embed a multi-symbol auxiliary data string therein, wherein transmission of the wireless voice signal also conveys the auxiliary signal hidden therein.
Claim 9
Dependent Claim
13 words
The transceiver of claim 6 which includes altering the voice signal at baseband.
Claim 10
Dependent Claim
37 words
The transceiver of claim 6 which includes modulating an intermediate carrier signal to produce a voice signal at a frequency band above baseband, and altering the modulated signal to steganographically embed the multi-symbol auxiliary data string therein.
Claim 11
Dependent Claim
14 words
The transceiver of claim 6 in which the voice signal is a digital signal.
Claim 12
Dependent Claim
25 words
The transceiver of claim 6 in which the auxiliary data string comprises data used by a carrier facility to identify fraudulent use of the transceiver.
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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) | 2003-05-16 | 2003-11-15 | 2004-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-16 | 2007-11-15 | 2008-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-16 | 2011-11-15 | 2012-05-16 | $7700.00 | Window Closed / Lapsed |