Method and system for dynamic software updates

• US 20050257205A1
• Filed: 05/13/2004
• Published: 11/17/2005
• Est. Priority Date: 05/13/2004
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Shende, Manojkumar H., Costea, Mihai, McGuire, Thomas D.
• Application Number:
  US10/845,300
• Publication Number:
  US 20050257205A1
• Time in Patent Office: Days
• US Class Current: 717/168
• CPC Class Codes: G06F 8/65 Updates security arrangements therefor G06F21/57

Abstract

A system and method for dynamically updating digital information, such as a data file, between computing devices in a computer network are provided. The digital information identifier, such as a file name, and a unit identifier, such as a size, of the digital information are provided by a publishing computing device. The publishing computing device receives a request for a delta portion of the identified digital information and, in response to the request, dynamically generates a patch including a copy of the requested information. Once the patch is generated, publishing computing device provides the patch to the party requesting the information.

Claims

1. A method for dynamically generating and providing a patch to a computing device, the method comprising:

providing a data file identifier identifying a data file;

providing a unit identifier representative of the data file;

in response to receiving a request for a tail portion of the data file, dynamically generating a patch including a copy of the requested tail portion of the data file; and

providing the dynamically generated patch to the computing device.

2. The method as recited in claim 1, further comprising:

authenticating that a user submitting the request is authorized to receive the dynamically generated patch.

3. The method as recited in claim 1, wherein the data file includes a virus signature.

4. The method as recited in claim 1, wherein the copy of the requested tail portion of the data file includes a virus signature.

5. The method as recited in claim 4, wherein the virus signature is compressed.

6. The method as recited in claim 1, wherein the copy of the requested portion of the data file includes a plurality of virus signatures, and wherein dynamically generating a patch includes, individually compressing at least two of the plurality of virus signatures.

7. The method as recited in claim 6, wherein dynamically generating a patch includes, including a digital signature, and wherein the digital signature is not compressed.

8. The method as recited in claim 1, wherein the data file identifier is a name of the data file.

9. The method as recited in claim 1, wherein the unit identifier is a size of the data file.

10. The method as recited in claim 1, wherein the unit identifier is a number of virus signatures included in the data file.

11. The method as recited in claim 1, wherein the request for a tail portion of the data file includes a request for a number of virus signatures.

12. The method as recited in claim 1, wherein dynamically generating a patch includes, including in the dynamically generated patch a digital signature.

13. The method as recited in claim 12, wherein the digital signature is a private key digital signature.

14. The method as recited in claim 1, wherein the requested tail portion of the data file is a request for the entire data file.

15. The method as recited in claim 1, wherein the data file is a hash value representative of the data file.

16. In a computer network having a plurality of computing devices in communication, a method for updating a local data file, the method comprising:

obtaining a data file identifier identifying a master data file;

obtaining a unit identifier representative of the master data file;

determining a delta between the master data file and the local data file;

obtaining a patch including a copy of a portion of the master data file representative of the determined delta; and

updating the local data file with the obtained copy of the delta portion of the master data file.

17. The method as recited in claim 16, further comprising:

determining if the local data file is valid.

18. The method as recited in claim 17, wherein determining if the local data file is valid includes comparing the obtained data file identifier with a local data file identifier.

19. The method as recited in claim 18, wherein the obtained data file identifier is a first data file name and the local data file identifier is a second data file name;

and

wherein determining if the local data file is valid includes, comparing the first data file name and the second data file name and confirming that the first data file name and the second data file name match.

20. The method as recited in claim 18, further comprising:

obtaining a digital signature; and

wherein determining if the local data file is valid includes verifying that the obtained digital signature matches a local digital signature.

21. The method as recited in claim 16, wherein obtaining a patch includes:

sending a request for a delta portion of the master data file equal to the difference in a size of the master data file and a size of the local data file; and

downloading the requested delta portion of the master data file.

22. The method as recited in claim 16, wherein updating the local data file includes regenerating the local data file to include the downloaded delta portion of the master data file.

23. The method as recited in claim 16, wherein subsequent to updating the local data file, the local data file matches the master data file.

24. The method as recited in claim 16, wherein updating the local data file includes decompressing the obtained patch.

25. The method as recited in claim 16, wherein the obtained copy of the portion of the master data file includes a virus signature.

26. In a computer system having a computer-readable medium having a computer-executable program therein for performing the method of dynamically generating and providing data file updates through a network, the method comprising:

publishing on the network an identifier and a size of a data file;

receiving from a source on the network a request for a portion of the data file;

determining if the source is authorized to receive the requested portion of the data file;

dynamically generating an appropriate data file update in response to the request; and

providing to the source the dynamically generated data file update.

27. The method as recited in claim 26, wherein the request for a portion of the data file is a request for all of the data file.

28. The method as recited in claim 26, wherein the data file includes a plurality of virus signatures.

29. The method as recited in claim 26, wherein the dynamically generated data file update includes a digital signature.

30. In a computer system having a computer-readable medium having a computer-executable program therein for performing the method of validating a local data file and updating the local data file, the method comprising:

receiving a first transmission of information, the first transmission of information including a master data file identifier, a unit identifier, and a digital signature;

validating the local data file with the received digital signature;

determining a delta difference between the received unit identifier and a local data file unit identifier;

requesting a delta portion of the master data file representative of the determined delta;

receiving a second transmission of information in response to the request, the second transmission of information including a copy of the requested delta portion of the master data file; and

regenerating the local data file in response to the received second transmission.

31. The computer system of claim 30, wherein the local data file includes a local digital signature;

and

wherein validating the local data file includes comparing the local digital signature and the received digital signature and confirming a match.

32. The computer system of claim 31, wherein the local digital signature is a public key and the received digital signature is a private key;

and

wherein comparing the local digital signature and the received digital signature includes authenticating the private key with the public key.

33. The computer system of claim 31, wherein the requested delta portion of the master data file received in the second transmission includes a virus signature.

34. The computer system of claim 33, wherein the virus signature is compressed.

35. The computer system of claim 31, wherein the requested delta portion of the master data file received in the second transmission includes a plurality of virus signatures;

and

wherein each of the plurality of virus signatures are individually compressed.

36. The computer system of claim 31, wherein the requested delta portion of the master data file received in the second transmission includes a second digital signature.

37. The computer system of claim 36, wherein the local data file includes a local digital signature;

and

wherein regenerating the local data file includes replacing the local digital signature with the second digital signature.