Exchanging data based upon device proximity and credentials

1. A method comprising:

transmitting a first credential from a mobile device to a proximate first device, the first device validating the first credential;

receiving, at the mobile device, a second credential from the first device; and

transmitting the second credential from the mobile device to a proximate second device, the second device to, upon validating the second credential, establish a session to exchange data with the first device.

2. The method of claim 1 , wherein proximate includes a range of 0 to 4 centimeters.

3. The method of claim 1 , wherein the first credential includes at least one of a private key, a public key, a hash value, a digital representation of a finger print, or a check sum value.

4. The method of claim 1 , wherein the first and second devices are part of a same local area network.

5. The method of claim 1 , wherein the data is transmitted directly between the first and second devices.

6. A mobile-computing device comprising:

at least one hardware processor;

a memory in communication with the at least one hardware processor, the memory including logic encoded in one or more tangible media for execution and when executed operable to:

transmit a first credential to a proximate first device, the first device validating the first credential;

receive a second credential from the first device; and

transmit the second credential to a proximate second device, the second device to, upon validating the second credential, establish a session to exchange data with the first device.

7. The mobile-computing device of claim 6 , wherein the first credential is used to subsequently access a user profile.

8. The mobile-computing device of claim 6 , wherein proximate includes a range of 0 to 4 centimeters.

9. The mobile-computing device of claim 6 , wherein the second credential includes at least one of a private key, a public key, a hash value, a digital representation of a finger print, or a check sum value.

10. The mobile-computing device of claim 6 , wherein the first and second devices are part of a same local area network.

11. The method of claim 1 , further comprising:

transmitting the data between the first and second devices via the mobile device.

12. The method of claim 1 , wherein the first device is to transmit the second credential to the mobile device in response to validating the first credential.

13. The method of claim 1 , further comprising:

terminating the session in response to a determination that the mobile device is not proximate to at least one of the first device and the second device.

14. The mobile-computing device of claim 6 , wherein the first device is to transmit the second credential to the mobile-computing device in response to validating the first credential.

15. The mobile-computing device of claim 6 , the logic further operable to:

terminate the session in response to a determination that the mobile-computing device is not proximate to at least one of the first device and the second device.

16. A computer program product comprising:

a tangible computer-readable medium having program code recorded thereon, said program code comprising:

program code to transmit a first credential from a mobile device to a proximate first device, the first device validating the first credential;

program code to receive, at the mobile device, a second credential from the first device; and

program code to transmit the second credential from the mobile device to a proximate second device, the second device to, upon validating the second credential, establish a session to exchange data with the first device.

17. The computer program product of claim 16 , wherein the first credential includes at least one of a private key, a public key, a hash value, a digital representation of a finger print, or a check sum value.

18. The computer program product of claim 16 , wherein the first and second devices are part of the same local area network.

19. The computer program product of claim 16 , further comprising:

program code to transmit the data between the first and second devices via the mobile device.

20. The computer program product of claim 16 , further comprising:

program code to terminate the session in response to a determination that the mobile device is not proximate to at least one of the first device and the second device.

21. An apparatus comprising:

means for transmitting a first credential from a mobile device to a proximate first device, the first device validating the first credential;

means for receiving, at the mobile device, a second credential from the first device; and

means for transmitting the second credential from the mobile device to a proximate second device, the second device to, upon validating the second credential, establish a session to exchange data with the first device.

22. The apparatus of claim 21 , wherein the second credential includes at least one of a private key, a public key, a hash value, a digital representation of a finger print, or a check sum value.

23. The apparatus of claim 21 , wherein the first and second devices are part of a same local area network.

24. The apparatus of claim 21 , further comprising:

means for terminating the session in response to a determination that the mobile device is not proximate to at least one of the first device and the second device.