Synchronizing distributed work through document logs

• US 8,903,788 B2
• Filed: 05/18/2007
• Issued: 12/02/2014
• Est. Priority Date: 07/09/2004
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Wolff, Gregory J., Piersol, Kurt W.
• Primary Examiner(s): Mofiz, Apu
• Assistant Examiner(s): NGUYEN, THU N
• Application Number:
  US11/804,435
• Publication Number:
  US 20070288441A1
• Time in Patent Office: 2,755 Days
• Field of Search: None
• US Class Current: 707/698
• CPC Class Codes: G06F 16/176 Support for shared access to files; File sharing support

Abstract

A method and apparatus is disclosed herein for synchronizing distributed work. In one embodiment, the method comprises receiving first and second metadata entries, adding the first and second metadata entries to a set corresponding to a digital object, and providing access to first and second unique identifiers used for referencing the first and second metadata entries respectively, where the first and second unique identifiers are based on contents of the first and second metadata entries respectively.

Claims

1. A method comprising:

receiving a search request for content from a document log for a first document, in which a scope of the search request is defined by specifying a hash value computed from the requested content and a context for the search, wherein the context comprises a host identifier and a document log identifier, wherein the host identifier identifies a server where the document log is hosted and the document log identifier comprises a hash value computed from contents of the first document and identifies the document log from among a plurality of document logs hosted by the server, wherein the search request includes a signature of a requestor for use by the server to authenticate, before a search is performed, the requestor'"'"'s knowledge of the first document in the document log, and wherein the signature of the requestor is a second hash value computed from a first data string representing contents of the first document concatenated with a second data string representing the search request for the content from the document log;

authenticating the requestor'"'"'s knowledge of the first document by comparing the signature of the requestor with an authentication hash value, computed by the server, from contents of the first document concatenated with the received search request for the content;

in response to successful authentication of the requestor'"'"'s knowledge,

limiting the search to the document log identified by the document log identifier in the search request, and

performing the limited search on the document log, by the server, based on the hash value.

2. The method defined in claim 1 wherein the context is specified implicitly based on a server receiving the search request.

3. The method defined in claim 1 wherein the context includes one or more of a hostname and a hash of the hostname.

7. The method defined in claim 1, wherein the document log is entangled with a second document log associated with a second document by inclusion of at least one entry of the second document log within a sequence of entries in the document log.

8. The method of claim 1, wherein document log for the first document comprises the first document as an initial document log entry into the document log and a plurality of sequential comments associated with the first document entered into the document log as subsequent document log entries.

4. A non-transitory computer-readable storage medium having instructions stored thereon which, when executed by a computer, cause the computer to:

receiving a search request for content from a document log for a first document, in which a scope of the search request is defined by specifying a hash value computed from the requested content and a context for the search, wherein the context comprises a host identifier and a document log identifier, wherein the host identifier identifies a server where the document log is hosted and the document log identifier comprises a hash value computed from contents of the first document and identifies the document log from among a plurality of document logs hosted by the server, wherein the search request includes a signature of a requestor for use by the server to authenticate, before a search is performed, the requestor'"'"'s knowledge of the first document in the document log, and wherein the signature of the requestor is a second hash value computed from a first data string representing contents of the first document concatenated with a second data string representing the search request for the content from the document log;

authenticating the requestor'"'"'s knowledge of the first document by comparing the signature of the requestor with an authentication hash value, computed by the server, from contents of the first document concatenated with the received search request for the content;

in response to successful authentication of the requestor'"'"'s knowledge,

limiting the search to the document log identified by the document log identifier in the search request, and

performing the limited search on the document log, by the server, based on the hash value.

5. An apparatus comprising:

a computer including;

an input to receive a search request for content from a document log for a first document, in which a scope of the search request is defined by specifying a hash value computed from the requested content and a context for the search, wherein the context comprises a host identifier and a document log identifier, wherein the host identifier identifies a server where the document log is hosted and the document log identifier comprises a hash value computed from contents of the first document and identifies the document log from among a plurality of document logs hosted by the server, wherein the search request includes a signature of a requestor for use by the server to authenticate, before a search is performed, the requestor'"'"'s knowledge of the first document in the document log, and wherein the signature of the requestor is a second hash value computed from a first data string representing contents of the first document concatenated with a second data string representing the search request for the content from the document log; and

a processing unit to

authenticate the requestor'"'"'s knowledge of the first document by comparing the signature of the requestor with an authentication hash value, computed by the server, from contents of the first document concatenated with the received search request for the content,

limit the search to the document log identified by the document log identifier in the search request, and

perform the limited search on the document log based on the hash value.

6. An apparatus comprising:

means for receiving a search request for content from a document log for a first document, in which a scope of the search request is defined by specifying a hash value computed from the requested content and a context for the search, wherein the context comprises a host identifier and a document log identifier, wherein the host identifier identifies a server where the document log is hosted and the document log identifier comprises a hash value computed from contents of the first document that identifies the document log from among a plurality of document logs hosted by the server, wherein the search request includes a signature of a requestor for use by the server to authenticate, before a search is performed, the requestor'"'"'s knowledge of the first document in the document log, and wherein the signature of the requestor is a second hash value computed from a first data string representing contents of the first document concatenated with a second data string representing the search request for the content from the document log;

means for authenticating the requestor'"'"'s knowledge of the first document by comparing the signature of the requestor with an authentication hash value, computed by the server, from contents of the first document concatenated with the received search request for the content;

in response to successful authentication of the requestor'"'"'s knowledge,

means for limiting the search to the document log identified by the document log identifier in the search request, and

means for performing the limited search on the document log, by the server, based on the hash value.