Method for secure operation of a computing device

1. A method of operating a computing device, the method comprising:

authenticating, at the computing device, an identity of a user;

receiving, at the computing device, a request from the user to carry out an operation;

in response to the request, determining at the computing device whether to enable the requested operation, the determining whether to enable the requested operation comprising:

determining an operation type of the requested operation, each operation associated with a respective operation type, at least one of a plurality of operation type set by the user;

determining a security time period associated with the operation type of the requested operation;

determining a time elapsed since the user was last authenticated; and

determining whether the time elapsed is greater than the security time period associated with the operation type of the requested operation;

in response to determining that the time elapsed is greater than the security time period, requiring re-authentication of the identity of the user at the computing device; and

in response to determining that the time elapsed is not greater than the security time period, enabling the requested operation;

wherein at least one security time period associated with an operation type is set by the user.

2. A method of claim 1 , wherein the identity of the user is authenticated using a pass phrase.

3. A method of claim 1 , wherein the identity of the user is authenticated using biometric information.

4. A method of claim 1 , wherein the security time period set for one operation type is different from a time period set for another operation type.

5. A method of claim 1 , wherein the security time period for at least one type of operation is arranged to expire upon completion of the immediately preceding operation of the same type.

6. A method of claim 1 , wherein the computing device comprises a mobile phone.

7. A computing device comprising:

a processor;

memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the computing device to:

authenticate an identity of a user;

receive a request from the user to carry out an operation;

in response to the request, determine whether to enable the requested operation, the determining whether to enable the requested operation comprising:

determine an operation type of the requested operation, each operation associated with a respective operation type, at least one of a plurality of operation types set by the user,

determining a security time period associated with the operation type of the requested operation,

determine a time elapsed since the user was last authenticated, and

determine whether the time elapsed is greater than the security time period associated with the operation type of the requested operation,

in response to determining that the time elapsed is greater than the security time period, requiring re-authentication of the identity of the user; and

in response to determining that the time elapsed is not greater than the security time period, enabling the requested operation;

wherein at least one security time period associated with an operation type is set by the user.

8. A computing device of claim 7 wherein the identity of the user is authenticated using a pass phrase.

9. A computing device of claim 7 wherein the identity of the user is authenticated using biometric information.

10. A computing device of claim 7 wherein the security time period set for one operation type is different from a time period set for another operation type.

11. A computing device of claim 7 wherein the security time period for at least one type of operation is arranged to expire upon completion of the immediately preceding operation of the same type.

12. A computing device of claim 7 , wherein the computing device comprises a mobile phone.

13. A non-transitory computer readable media, the computer readable media storing software modules, the software modules comprising computer executable instructions, that when executed on a computing device, configured for:

authenticating an identity of a user at the computing device;

receiving, at the computing device, a request from the user to carry out an operation;

in response to the request, determining whether to enable the requested operation, the determining whether to enable the requested operation comprising:

determining an operation type of the requested operation, each operation associated with a respective operation type;

determining a security time period associated with the operation type of the requested operation, at least one of a plurality of operation types set by the user;

determining a time elapsed since the user was last authenticated; and

determining whether the time elapsed is greater than the security time period associated with the operation type of the requested operation;

in response to determining that the time elapsed is greater than the security time period, requiring re-authentication of the identity of the user at the computing device; and

in response to determining that the time elapsed is not greater than the security time period, enabling the requested operation;

wherein at least one security time period associated with an operation type is set by the user.

14. A non-transitory computer readable media of claim 13 , wherein the identity of the user is authenticated using biometric information.

15. A non-transitory computer readable media of claim 13 , wherein the security time period set for one operation type is different from a time period set for another operation type.

16. A non-transitory computer readable media of claim 13 , wherein the security time period for at least one type of operation is arranged to expire upon completion of the immediately preceding operation of the same type.