Method and system for classifying and redacting segments of electronic documents

• US 8,887,301 B2
• Filed: 03/21/2013
• Issued: 11/11/2014
• Est. Priority Date: 03/04/2009
• Status: Active Grant

• Current Assignee: TITUS Inc.
• Original Assignee: TITUS Inc.
• Inventors: Warrington, Connor Stephen, Roy, Regi Baby, Pulfer, Charles Edouard, McCormick, Matthew Ryan
• Primary Examiner(s): Thiaw, Catherine
• Assistant Examiner(s): ZHAO, DON GORDON
• Application Number:
  US13/848,665
• Publication Number:
  US 20130212701A1
• Time in Patent Office: 600 Days
• Field of Search: 726/26, 726/27
• US Class Current: 726/27
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 2221/2141 Access rights, e.g. capability lists, access control lists, access tables, access matrices
• CPC Class Codes: G06Q 10/107 Computer-aided management of electronic mailing [e-mailing]
• CPC Class Codes: H04L 63/04 for providing a confidential data exchange among entities communicating through data packet networks

Abstract

A method for classifying and redacting electronic documents, for example an email message, is described. The classification and redaction of segments of the email message are based on rules. Using the rules, multiple versions of the email message, each corresponding to recipients with specific clearance levels are generated. A selective redacting of certain segments of the email message concurrently with sending previously redacted segments of the same email message is described. A corresponding system for classifying and redacting electronic documents is also provided.

Claims

1. A computerized method for classifying and redacting an email message for distributing to multiple recipients having different security levels, the method comprising:

using a processor for;

selecting a segment of the email message;

automatically analyzing contents of the selected segment in real time by using an artificial intelligence (AI) system;

automatically classifying the segment, based on results of the analysis performed by the artificial intelligence system, and in accordance with a set of classification options characterizing a type of information contained in the segment;

automatically marking the segment in accordance with a respective classification option, producing a marked segment;

automatically classifying the email message based on classifications of segments of the email message; and

automatically redacting the email message in real time in accordance with a respective clearance level of a recipient of the email message, producing a redacted email message, comprising;

(i) arranging recipients of the email message in a hierarchy in accordance with respective clearance levels such that a recipient with a higher clearance level occupies a higher level in the hierarchy in comparison to a recipient with a lower clearance level; and

(ii) automatically distributing the redacted email message to the recipients of a particular level in the hierarchy concurrently with the redacting marked segments for the recipients at the immediate lower level in the hierarchy.

2. The method of claim 1, further comprising distributing the redacted email message to the recipients of a particular level in the hierarchy.

3. The method of claim 1, wherein the automatically redacting is performed concurrently with writing the email message by a sender of the email message.

4. The method of claim 1, wherein the automatically analyzing comprises analyzing a newly typed string of characters of the segment in real time in the context of the previously entered content of the segment.

5. The method of claim 4, wherein the automatically analyzing further comprises identifying a word in the string of characters, comparing the word with a predetermined list of words including synonyms, and making a decision based on a degree of match between the word and the predetermined list of words, how the word should be classified.

6. The method of claim 1, wherein the AI is a decision tree AI system, comprising decision nodes and conclusion nodes, each decision node having outcomes connecting the decision node to another decision node or to the conclusion node.

7. The method of claim 1, wherein the email message is formatted in Extensible Markup Language (XML) format.

8. The method of claim 1, wherein the redacting comprises removing or excluding the segment.

9. The method of claim 1, wherein the automatically analyzing and the automatically redacting are performed by using two threads in a multicore processor environment.

10. The method of claim 1, further comprising redacting marked segments incrementally, comprising redacting the marked segments for the recipients in a particular level in the hierarchy prior to the redacting the marked segments for the recipients at an immediate lower level in the hierarchy.

11. A computerized system for classifying and redacting an email message for distributing to multiple recipients having different security levels, the system comprising:

a processor;

a non-transitory computer readable storage medium having computer readable instructions stored thereon for execution by the processor, causing the processor to;

select a segment of the email message;

automatically analyze contents of the selected segment in real time by using an artificial intelligence (AI) system;

automatically classify the segment, based on results of the analysis performed by the artificial intelligence system, and in accordance with a set of classification options characterizing a type of information contained in the segment;

automatically mark the segment in accordance with a respective classification option to produce a marked segment;

automatically classify the email message based on classifications of segments of the email message; and

automatically redact the email message in real time in accordance with a respective clearance level of a recipient of the email message, producing a redacted email message, comprising;

(i) arranging recipients of the email message in a hierarchy in accordance with respective clearance levels such that a recipient with a higher clearance level occupies a higher level in the hierarchy in comparison to a recipient with a lower clearance level; and

(ii) automatically distributing the redacted email message to the recipients of a particular level in the hierarchy concurrently with the redacting marked segments for the recipients at the immediate lower level in the hierarchy.

12. The system of claim 11, wherein the computer readable instructions further cause the processor to distribute the redacted email message to the recipients of a particular level in the hierarchy.

13. The system of claim 11, wherein the computer readable instructions further cause the processor to automatically redact the email message concurrently with writing the email message by a sender of the email message.

14. The system of claim 11, wherein the computer readable instructions further cause the processor to analyze a newly typed string of characters of the segment in real time in the context of the previously entered content of the segment.

15. The system of claim 14, wherein the computer readable instructions further cause the processor to identify a word in the string of characters, compare the word with a predetermined list of words including synonyms, and make a decision based on a degree of match between the word and the predetermined list of words, how the word should be classified.

16. The system of claim 11, wherein the AI is a decision tree AI system, comprising decision nodes and conclusion nodes, each decision node having outcomes connecting the decision node to another decision node or to the conclusion node.

17. The system of claim 11, wherein the email message is formatted in Extensible Markup Language (XML) format.

18. The system of claim 11, wherein the computer readable instructions further cause the processor to redact the segment by removing or excluding the segment.

19. The system of claim 11, wherein the computer readable instructions further cause the processor to automatically redact and distribute by using two threads in a multicore processor environment.

20. The system of claim of claim 11, wherein the computer readable instructions further cause the processor to redact marked segments incrementally, comprising redacting the marked segments for the recipients in a particular level in the hierarchy prior to the redacting the marked segments for the recipients at an immediate lower level in the hierarchy.