Log integrity verification

• US 20070156777A1
• Filed: 12/29/2005
• Published: 07/05/2007
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Piersol, Kurt, Wolff, Gregory
• Granted Patent: US 8,095,537 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/93 Document management systems

Abstract

A method and an apparatus for log integrity verification are described. In one embodiment, the method comprises receiving a first log and determining whether checkpoint hashes after each entry are consistent.

Claims

1. A method comprising:

receiving a first log; and

determining whether checkpoint hashes after each entry are consistent.

2. The method defined in claim 1 further comprising calculating a new checkpoint hash by taking the most recent checkpoint hash and concatenating the most recent checkpoint hash with the new cache entries.

3. The method defined in claim 1 further comprising including the checkpoint hash information in a second log.

4. An article of manufacture having one ore more recordable media having instructions thereon which, when executed by a system, cause the system to perform a method comprising:

receiving a first log; and

determining whether checkpoint hashes after each entry are consistent.

5. The article of manufacture defined in claim 4 wherein the method further comprises calculating a new checkpoint hash by taking the most recent checkpoint hash and concatenating the most recent checkpoint hash with the new cache entries.

6. The article of manufacture defined in claim 4 wherein the method further comprises including the checkpoint hash information in a second log.

7. An apparatus comprising:

means for receiving a first log; and

means for determining whether checkpoint hashes after each entry are consistent.

8. A method comprising:

analyzing data in one or more metadata entries of a set corresponding to a digital object stored separately from the one or more metadata entries and each metadata entry being identified with an identifier based on its content; and

providing references to other data based on analysis of content in the one or more metadata entries.

9. The method defined in claim 8 wherein analyzing data in the one or more metadata entries comprises determining relevance of the document based on content in the one or more metadata entries in the set.

10. The method defined in claim 9 wherein determining relevance comprises calculating relevance metrics based on content in the one or more metadata entries in the set.

11. The method defined in claim 10 wherein determining relevance comprises performing term frequency.

12. The method defined in claim 10 wherein determining relevance comprises performing inverse document frequency.

13. The method defined in claim 10 wherein determining relevance comprises searching for keywords in the content in the one or more metadata entries in the set.

14. The method defined in claim 8 further comprising identifying digital objects of one or more authors that provided comments on a currently displayed document, and wherein providing references to other data based on analysis of content in the one or more metadata entries comprises displaying information on the identified digital objects.

15. The method defined in claim 14 wherein the information comprises a link for at least one of the identified digital objects.

16. The method defined in claim 14 wherein the information comprises a thumbnail image corresponding to at least one of the identified digital objects.

17. The method defined in claim 8 further comprising identifying each metadata entry having a specified type, and wherein providing references to other data based on analysis of content in the one or more metadata entries comprises displaying content from the identified digital objects.

18. The method defined in claim 8 wherein the at least one metadata entry comprises a document log entry.

19. The method defined in claim 8 wherein each metadata entry is identified with an identifier based on its content.

20. The method defined in claim 19 wherein the identifier is a hash value.

21. The method defined in claim 19 wherein the identifier is a result of applying a hashing function to an electronic form of the content.

22. The method defined in claim 21 wherein the hashing function is the MD5 hashing algorithm.

23. The method defined in claim 8 wherein the set is stored separately from the digital object.

24. The method defined in claim 23 wherein the set of metadata entries is separate from content of the digital object and attached to the digital object electronically.

25. The method defined in claim 8 wherein the set is in XML format.

26. The method defined in claim 25 wherein each entry in the set is an XML segment.

27. The method defined in claim 8 wherein the set comprises a document log.

28. The method defined in claim 8 wherein the digital object comprises a plurality of bytes.

29. The method defined in claim 8 wherein the digital object comprises a document.

30. An article of manufacture having one ore more recordable media having instructions thereon which, when executed by a system, cause the system to perform a method comprising:

analyzing data in one or more metadata entries of a set corresponding to a digital object stored separately from the one or more metadata entries and each metadata entry being identified with an identifier based on its content; and

providing references to other data based on analysis of content in the one or more metadata entries.