Defined zone of authentication

1. A method for authenticating a user at an electronic computing device, the method comprising:

receiving information from a defined zone of an environment surrounding the user, the information including identities of one or more individuals positioned within the defined zone of the environment, wherein a size of the defined zone is increased or decreased based upon sources of information within the environment;

calculating a level of authentication for the user at least in part based upon the information from the defined zone of the environment; and

when the level of authentication meets a threshold, authenticating the user at the electronic computing device.

2. The method of claim 1 , further comprising:

receiving updates to the information;

recalculating the level of authentication for the user based upon the updates to the information; and

maintaining the authentication for the user as long as the level of authentication for the user meets the threshold.

3. The method of claim 1 , further comprising decreasing the level of authentication for the user when the one or more individuals positioned within the defined zone of the environment are a security risk.

4. The method of claim 1 , further comprising receiving from the user one or more elections regarding which aspects of the information can be used by the electronic computing device to calculate the level of authentication.

5. The method of claim 1 , wherein the information includes a current context for the user.

6. The method of claim 5 , wherein the current context is determined by determining a current activity of the user and determining how the current activity fits into a pattern of behavior for the user.

7. The method of claim 1 , wherein the information includes one or more biometric parameters regarding the user.

8. The method of claim 1 , wherein the information includes information from one or more social media sites.

9. The method of claim 1 , further comprising:

identifying a first sphere of authentication surrounding the user;

identifying additional spheres of authentication surrounding the one or more individuals positioned within the defined zone of the environment; and

determining the level of authentication, in part, based on an effect of the additional spheres of authentication on the first sphere of authentication.

10. The method of claim 1 , further comprising modifying the level of authentication for the user as the one or more individuals move into and out of the defined zone of the environment.

11. An electronic computing device comprising:

a processing unit; and

system memory, the system memory including instructions which, when executed by the processing unit, cause the electronic computing device to:

receive information from a defined zone of an environment surrounding the user, the information including identities of one or more individuals positioned within the defined zone of the environment, wherein a size of the defined zone is increased or decreased based upon sources of information within the environment;

calculate a level of authentication for the user at least in part based upon the information from the defined zone of the environment; and

when the level of authentication meets a threshold, authenticate the user at the electronic computing device.

12. The electronic computing device of claim 11 , wherein the system memory encodes further instructions which, when executed by the processing unit, cause the electronic computing device to:

receive updates to the information;

recalculate the level of authentication for the user based upon the updates to the information; and

maintain the authentication for the user as long as the level of authentication for the user meets the threshold.

13. The electronic computing device of claim 11 , wherein the system memory encodes further instructions which, when executed by the processing unit, cause the electronic computing device to decrease the level of authentication for the user when the one or more individuals positioned within the defined zone of the environment are a security risk.

14. The electronic computing device of claim 11 , wherein the system memory encodes further instructions which, when executed by the processing unit, cause the electronic computing device to receive from the user one or more elections regarding which aspects of the information can be used by the electronic computing device to calculate the level of authentication.

15. The electronic computing device of claim 11 , wherein the information includes a current context for the user.

16. The electronic computing device of claim 15 , wherein the current context is determined by determining a current activity of the user and determining how the current activity fits into a pattern of behavior for the user.

17. The electronic computing device of claim 11 , wherein the information includes one or more biometric parameters regarding the user.

18. The electronic computing device of claim 11 , wherein the information includes information from one or more social media sites.

19. The electronic computing device of claim 11 , wherein the system memory encodes further instructions which, when executed by the processing unit, cause the electronic computing device to:

identify a first sphere of authentication surrounding the user;

identify additional spheres of authentication surrounding the one or more individuals positioned within the defined zone of the environment; and

determine the level of authentication, in part, based on an effect of the additional spheres of authentication on the first sphere of authentication.

20. The electronic computing device of claim 11 , wherein the system memory encodes further instructions which, when executed by the processing unit, cause the electronic computing device to modify the level of authentication for the user as the one or more individuals move into and out of the defined zone of the environment.