Social and proximity based access control for mobile applications

1. A computer readable storage medium comprising a computer readable program for proximity-based access control, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:

determining a distance from a first mobile device to each of one or more safe mobile devices which falls below a threshold distance;

determining, using a processor, a number of safe mobile devices within the threshold distance which exceeds a safe gathering threshold, the safe gathering threshold being a particular number of devices from among the safe mobile devices with threshold number of secret keys sufficient for decryption; and

activating a safe gathering policy in accordance with the safe gathering threshold that decreases a security level in the first mobile device.

2. A system for proximity-based access control, comprising: a processor device operatively coupled to a memory, the processor device being configured to:

determine, using a proximity module, a distance from a first mobile device to each of one or more safe mobile devices which falls below a threshold distance;

determine, using a policy engine comprising a processor, a number of safe mobile devices within the threshold distance which exceeds a safe gathering threshold, the safe gathering threshold being a particular number of devices from among the safe mobile devices with threshold number of secret keys sufficient for decryption; and

activate, using a security module, a safe gathering policy in accordance with the safe gathering threshold that decreases a security level in the first mobile device.

3. The system of claim 2 , wherein the policy engine is further configured to periodically verify that the number of safe mobile devices exceeds the safe gathering threshold and, if not, deactivating the safe gathering policy.

4. The system of claim 2 , wherein the security module is further configured to prompt a user of the first mobile device for a decision as to whether to activate the safe gathering policy.

5. The system of claim 2 , wherein the proximity module is further configured to receive an identifier and a signal strength magnitude from the safe mobile device.

6. The system of claim 2 , wherein the proximity module is further configured to determine whether the first mobile device is physically located within a safe space and the security module is to activate the safe gathering policy further in accordance with presence in the safe space.

7. The system of claim 6 , wherein the proximity module is further configured to determine whether the first mobile device is within a threshold range of one or more fixed transmitting stations.

8. The system of claim 6 , wherein the proximity module is further configured to access door access logs to determine the identities of people who have entered the safe space.

9. The system of claim 2 , wherein safe mobile devices include devices sharing a threshold secret key with the first mobile device and wherein the policy engine is further configured to determine whether enough threshold secret keys are available to meet a decryption threshold.

10. The system of claim 2 , wherein the safe gathering policy implements one or more authentication schemes that are less strict than a default authentication scheme.

11. The system of claim 2 , wherein the safe gathering threshold is one of a set of safe gathering thresholds having varying levels of safety and wherein activating a safe gathering policy comprises selecting a policy from a set of safe gathering policies in accordance with a corresponding safe gathering threshold.

12. The system of claim 2 , wherein the policy engine is further configured to determine whether a meeting is scheduled and wherein the security module is further configured to activate the safe gathering policy further in accordance with a determination that a meeting is scheduled.

13. The computer readable storage medium of claim 1 , further comprising periodically verifying that the number of safe mobile devices exceeds the safe gathering threshold and, if not, deactivating the safe gathering policy.

14. The computer readable storage medium of claim 1 , wherein activating the safe gathering policy comprises prompting a user of the first mobile device for a decision as to whether to activate the safe gathering policy.

15. The computer readable storage medium of claim 1 , wherein determining whether the distance between a safe mobile device and the first mobile device falls below a threshold comprises receiving an identifier and a signal strength magnitude from the safe mobile device.

16. The computer readable storage medium of claim 1 , wherein the one or more safe mobile devices comprise at least one identification badge having the ability to send identification signals.

17. The computer readable storage medium of claim 1 , further comprising:

determining whether the first mobile device is physically located within a safe space; and

activating the safe gathering policy further in accordance with presence in the safe space.

18. The computer readable storage medium of claim 17 , wherein determining whether the first mobile device is located in a safe space comprises determining whether the first mobile device is within a threshold range of one or more fixed transmitting stations.

19. The computer readable storage medium of claim 17 , wherein determining whether the first mobile device is located in a safe space comprises accessing door access logs to determine the identities of people who have entered the safe space.

20. The computer readable storage medium of claim 1 , wherein safe mobile devices include devices sharing a threshold secret key with the first mobile device and wherein determining whether a number of safe mobile devices within the threshold distance exceeds a safe gathering threshold comprises determining whether enough threshold secret keys are available to meet a decryption threshold.