Agent based application reputation system for operating systems

1. A method for implementing a security agent on behalf of a device, the method comprising:

obtaining, by a processor, a list of applications installed on the device from a repository remote from the security agent and device, wherein the repository is located on another device independent from the security agent and the device;

for each respective application on the list, comparing reputation attributes obtained from a reputation database against attributes of the application installed on the device; and

for any of the respective applications for which it is determined from the comparing that the application installed on the device is malicious, taking action to limit malicious activity by the respective application installed on the device;

wherein the security agent is not installed on the device.

2. The method according to claim 1 , wherein the security agent obtains the list of applications installed on the device using security credentials provided by a user of the device.

3. The method according to claim 2 , wherein the security agent obtains the list of applications installed on the device from at least one of a virtual application store and a virtual social networking site from which the installed applications were downloaded to the device.

4. The method according to claim 1 , wherein the reputation attributes for each respective application on the list that are obtained from the reputation database comprise at least:

whether the respective application is malicious or safe;

battery consumption due to execution of the respective application; and

resources on the device that are accessed by the respective application.

5. The method according to claim 4 , wherein the reputation attributes are obtained from the reputation database by deriving a unique identifier for each respective application on the list and submitting each of the derived unique identifiers to the reputation database.

6. A non-transitory computer readable memory storing a set of executable instructions for implementing a security agent on behalf of a device, the set of executable instructions comprising:

code for obtaining, by a processor, a list of applications installed on the device from a repository remote from the security agent and the device, wherein the repository is located on another device independent from the security agent and the device;

code for comparing, for each respective application on the list, reputation attributes obtained from a reputation database against attributes of the application installed on the device; and

for any of the respective applications for which it is determined from executing the code for comparing that the application installed on the device is malicious, code for taking action to limit malicious activity by the respective application installed on the device.

7. The computer readable memory according to claim 6 , wherein the code for obtaining operates to obtain the list of applications installed on the device using security credentials provided by a user of the device.

8. The computer readable memory according to claim 7 , wherein the code for obtaining operates to obtain the list of applications installed on the device from at least one of a virtual application store and a virtual social networking site from which the installed applications were downloaded to the device.

9. The computer readable memory according to claim 6 , wherein the reputation attributes for each respective application on the list that are obtained from the reputation database comprise at least:

whether the respective application is malicious or safe;

battery consumption due to execution of the respective application; and

resources on the device that are accessed by the respective application.

10. The computer readable memory according to claim 9 , wherein the reputation attributes are obtained from the reputation database by deriving a unique identifier for each respective application on the list and submitting each of the derived unique identifiers to the reputation database.

11. At least one security server comprising at least one memory storing a set of computer executable instructions and at least one processor, wherein the memory with the set of computer executable instructions is configured with the at least one processor to cause the security server to at least:

obtain, by the processor, a list of applications installed on a device from a repository remote from the security server and the device, wherein the repository is located on another device independent from the security server and the device;

for each respective application on the list, compare reputation attributes obtained from a reputation database against attributes of the application installed on the device; and

for any of the respective applications for which it is determined from the comparing that the application installed on the device is malicious, take action to limit malicious activity by the respective application installed on the device.

12. The at least one security server according to claim 11 , wherein the security agent obtains the list of applications installed on the device using security credentials provided by a user of the device.

13. The at least one security server according to claim 12 , wherein the security agent obtains the list of applications installed on the device from at least one of a virtual application store and a virtual social networking site from which the installed applications were downloaded to the device.

14. The at least one security server according to claim 11 , wherein the reputation attributes for each respective application on the list that are obtained from the reputation database comprise at least:

whether the respective application is malicious or safe;

battery consumption due to execution of the respective application; and

resources on the device that are accessed by the respective application.

15. The at least one security server according to claim 14 , wherein the reputation attributes are obtained from the reputation database by deriving a unique identifier for each respective application on the list and submitting each of the derived unique identifiers to the reputation database.

16. The security server according to claim 11 , wherein the set of computer executable instructions operate in conjunction with a security agent client application resident on the device to implement a personal cloud security service on behalf of the device using security credentials provided by a user of the device.