Location proofs

• US 9,332,427 B2
• Filed: 08/12/2013
• Issued: 05/03/2016
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Wolman, Alastair, Saroiu, Stefan
• Primary Examiner(s): Gee, Jason K.
• Assistant Examiner(s): Zhu, Zhimei
• Application Number:
  US13/965,121
• Publication Number:
  US 20130322630A1
• Time in Patent Office: 995 Days
• US Class Current: 1/1
• CPC Class Codes: G01S 19/23 Testing, monitoring, correcting or calibrating of receiver elements
• CPC Class Codes: G01S 19/396 Determining accuracy or reliability of position or pseudorange measurements
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G01S 5/0244 Accuracy or reliability of position solution or of measurements contributing thereto
• CPC Class Codes: H04W 12/03 Protecting confidentiality, e.g. by encryption
• CPC Class Codes: H04W 12/104 Location integrity, e.g. secure geotagging
• CPC Class Codes: H04W 12/12 Detection or prevention of fraud
• CPC Class Codes: H04W 12/42 using virtual identity modules
• CPC Class Codes: H04W 12/63 Location-dependent; Proximity-dependent

Abstract

A wireless computing device includes an antenna that is configured to transmit and receive wireless signals. The wireless computing device comprises a transmitter component that causes a first wireless signal to be transmitted to a wireless access point via the antenna, wherein the first wireless signal comprises a request for a location proof, wherein the request for the location proof comprises data that identifies the wireless computing device, and wherein the location proof comprises data that is indicative of a geographic location of the wireless access point. The system also includes a receiver component that receives, via the antenna, a second wireless signal from the wireless access point, wherein the second wireless signal is received by the receiver component subsequent to the transmitter component causing the first wireless signal to be transmitted to the wireless access point.

Claims

1. A method, comprising;

receiving a request for content from a computing device, the request comprising an encrypted location proof, the location proof comprising first data that identifies the computing device, second data that identifies a wireless access point that issued the encrypted location proof to the computing device, and data that is indicative of a geographic location of the wireless access point;

decrypting the encrypted location proof to obtain the first data and the second data; and

outputting the content based upon the first data, the second data, and the data that is indicative of the geographic location of the wireless access point.

2. The method of claim 1, wherein the first data further identifies a known location of the wireless access point.

3. The method of claim 2, wherein the first data further identifies a time when the wireless access point issued the encrypted location proof.

4. The method of claim 1, wherein the computing device is a mobile telephone.

5. The method of claim 1, wherein the requested content comprises television programming.

6. The method of claim 1, wherein the data that identifies the computing device comprises a signature generated by the computing device.

7. The method of claim 1, wherein the data that identifies the computing device comprises a public key.

8. The method of claim 1, wherein the encrypted location proof has a signature appended thereto that identifies the computing device, the method further comprising:

comparing the first data with the signature; and

outputting the content only if an identity of the computing device in the first data and an identity of the computing device represented by the signature are equivalent.

9. The method of claim 1, wherein the requested content comprises an electronic loyalty discount.

10. A wireless access point comprising:

a processor; and

memory storing instructions that, when executed by the processor, cause the processor to perform acts comprising;

receiving a request from a computing device for a location proof, the request comprising first data that identifies the computing device;

responsive to receiving the request, generating a location proof for the computing device, the location proof comprising the first data, second data that identifies the wireless access point, and data that is indicative of a geographic location of the wireless access point;

encrypting the location proof to generate an encrypted location proof; and

transmitting the encrypted location proof to the computing device.

11. The wireless access point of claim 10, the computing device being a mobile computing device.

12. The wireless access point of claim 10, the location proof further comprising data that identifies a location of the wireless access point.

13. The wireless access point of claim 10, the acts further comprising:

transmitting a beacon signal, the beacon signal comprising data that indicates that the wireless access point is capable of generating location proofs.

14. The wireless access point of claim 13, wherein the beacon signal comprises a sequence number, and wherein the request from the computing device comprises the sequence number.

15. The wireless access point of claim 14, wherein the request from the computing device comprises a signature of the computing device appended to the sequence number.

16. The wireless access point of claim 10, further comprising a global positioning system (GPS) transceiver that outputs location data, the acts further comprising including the location data output by the GPS transceiver in the location proof.

17. The wireless access point of claim 10, wherein the location proof further comprises data that identifies a time when the location proof generator component generated the location proof.

18. A computer-readable data storage device comprising instructions that, when executed by a processor, cause the processor to perform acts comprising:

receiving, from a mobile computing device, a request for content, the request for content comprising an encrypted location proof, the location proof comprising first data that identifies the mobile computing device that issued the request, second data that identifies a wireless access point that generated the location proof, and data that is indicative of a geographic location of the wireless access point;

authenticating the location proof based upon the first data, the second data, and the data that is indicative of the geographic location of the wireless access point;

responsive to authenticating the location proof, transmitting the content requested by the mobile computing device to the mobile computing device.

19. The computer-readable data storage device of claim 18, wherein the content is television programming.

20. The computer-readable data storage device of claim 18, wherein the encrypted location proof has a signature of the mobile computing device appended thereto, and wherein the authenticating of the location proof comprises ascertaining that the signature of the mobile computing device corresponds to the first data.