GEO-SECURITY METHOD AND SYSTEM

• US 20170099576A1
• Filed: 10/05/2016
• Published: 04/06/2017
• Est. Priority Date: 10/05/2015
• Status: Active Grant

• Current Assignee: Qatar Foundation For Education, Science And Community Development
• Original Assignee: Qatar Foundation For Education, Science And Community Development
• Inventors: ABDALLAH, MOHAMED MAHMOUD, CHAMBERLAND, JEAN-FRANCOIS, HUFF, GREGORY H., EL-SALLABI, HASSAN MOHAMED, QARAQE, KHALID ALI
• Granted Patent: US 10,321,262 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/10 Integrity
• CPC Class Codes: H04W 12/63 Location-dependent; Proximity-dependent
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences

Abstract

The geo-security method and system uses spatio-temporal radio channel information during authentication to grant permission to access, use and/or operate the intended device. The geo-security method and system uses a wideband radio channel impulse response (or transfer function of radio channel) from antenna of RF source to antenna of a RF receiver at the device position to determine the legitimacy of the intended device'"'"'s location.

Claims

1. A geo-security method, comprising the steps of:

(a) transmitting a probe signal using a transmitter of a wireless device at a transmission site to be authenticated;

(b) time-reversal precoding a feedback transmission based on a channel response estimation of the probe signal;

(c) including the time-reversal precoding in a signal transmission at the transmission site to be authenticated;

(d) estimating the time-reversal precoding in the signal transmission; and

(e) authenticating the transmission site based on the estimating step (d) and the probe signal channel response estimation of step (b).

2. The geo-security method according to claim 1, further comprising the step of authenticating multiple wireless devices by repeating the steps of claim 1 for each said wireless device, each said wireless device having a unique time reversal (TR) spatial-temporal authentication key.

3. The geo-security method according to claim 2, further comprising the step of using multiple said unique TR authentication keys for every antenna to authenticate the multiple said wireless devices, the authentication being based on multiple transmit antennas corresponding to the multiple said wireless devices.

4. The geo-security method according to claim 2, wherein the transmission site to be authenticated has multiple transmit antennas, the method further comprising the step of performing steps (a) through (e) independently for each of the multiple transmit antennas so that the authentication is based on multiple transmit antennas, whereby the authentication of the transmission site is improved.

5. The geo-security method according to claim 2, further comprising the step of using a reconfigurable antenna in which a particular radiation pattern is generated to increase security and enhance system performance.

6. The geo-security method according to claim 5, wherein the particular antenna radiation pattern generating step further comprises the step of identifying each radiation pattern state using a unique combination code of ON-OFF switches in control circuitry of the antenna.

7. The geo-security method according to claim 6, wherein said step of authenticating the transmission site further comprises the step of measuring spatial focusing of energy at the antenna of the authenticated device at a specific instant of time.

8. The geo-security method according to claim 6, wherein said step of authenticating the transmission site further comprises the step of measuring peak energy of a received signal independently from a time delay.

9. The geo-security method according to claim 6, further comprising the step of detecting an energy level that is higher than a pre-set threshold at a receiver of the authenticated device, authentication being based on measuring a 3-dB contour around the pre-set threshold to allow local movement of the authenticated device.

10. The geo-security method according to claim 6, wherein said step of authenticating the transmission site further comprises the step of measuring time delay focusing of energy at the antenna of the wireless device to measure the temporal compression due to the authenticating process, the time delay energy focusing being characterized by:

11. The geo-security method according to claim 6, wherein said step of authenticating the transmission site further comprises the step of measuring temporal energy focusing with peak-to-side lobe ratio characterized by:

12. A geo-security system, comprising:

((a) means for transmitting a probe signal using a transmitter of a wireless device at a transmission site to be authenticated;

(b) means for time-reversal precoding a feedback transmission based on a channel response estimation of the probe signal;

(c) means for including the time-reversal precoding in a signal transmission at the transmission site to be authenticated;

(d) means for estimating the time-reversal precoding in the signal transmission; and

(e) means for authenticating the transmission site based on the time-reversal precoding estimating means (d) and the probe signal channel response estimation.

13. The geo-security system according to claim 12, wherein said means (b), means (d), and means (e) each comprise means for authenticating multiple said wireless devices, each said wireless device having a corresponding said means (a), a corresponding means (c), and a unique time reversal (TR) spatial-temporal authentication key.

14. The geo-security system according to claim 13, wherein each said wireless device has a corresponding antenna, the system further comprising means for using said unique TR authentication keys for each said antenna to authenticate said wireless devices.

15. The geo-security system according to claim 13, further comprising means for using a reconfigurable antenna in which a particular radiation pattern is generating to increase security and enhance system performance.

16. The geo-security system according to claim 15, further comprising means for identifying each radiation pattern state using a unique combination code of ON-OFF switches in control circuitry of the antenna.

17. The geo-security system according to claim 16, further comprising means for measuring spatial focusing of energy at the antenna of the authenticated device at a specific instant of time.

18. The geo-security system according to claim 16, further comprising means for measuring peak energy of the received signal independently from a time delay.

19. The geo-security system according to claim 16, further comprising means for detecting an energy level higher than a pre-set threshold at the receiver of the authenticated device, the system having means for measuring a 3-dB contour around the pre-set threshold to allow local movement of the authenticated device.

20. The geo-security system according to claim 16, further comprising means for measuring temporal energy focusing with peak-to-side lobe ratio characterized by: