Automated document redaction

• US 9,195,853 B2
• Filed: 01/15/2012
• Issued: 11/24/2015
• Est. Priority Date: 01/15/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Fox, Joshua, Magdalen, Josemina Marcella, Pelts, Michael
• Primary Examiner(s): Mills, Frank D
• Application Number:
  US13/350,794
• Publication Number:
  US 20130185634A1
• Time in Patent Office: 1,409 Days
• Field of Search: 715/256
• US Class Current: 1/1
• CPC Class Codes: G06F 21/6254 by anonymising data, e.g. decorrelating personal data from the owner's identification

Abstract

Document redaction includes identifying within a computer-based document stored on computer-readable storage medium, a candidate redaction element that is of a predefined redaction element type, identifying an evaluation element that is of a predefined evaluation element type and that is associated with the candidate redaction element, identifying a predefined logic expression that is associated with the redaction element type and that operates on the evaluation element type, evaluating the logic expression which generates a value, identifying a predefined permission expression that is associated with the logic expression, that operates on the value, and that is associated with a recipient role, evaluating the permission expression, which identifies a redaction directive, and applying the redaction directive to the candidate redaction element within the computer-based document prior to the computer-based document being provided to a recipient having the recipient role.

Claims

1. A document redaction method comprising:

identifying within a computer-based document stored on a computer-readable storage medium, a candidate redaction element that is of a predefined redaction element type;

identifying an evaluation element within the document of a predefined evaluation element type and that associated with the candidate redaction element, wherein the evaluation element of the candidate redaction element associates one evaluation element type of information with the candidate redaction element;

identifying a predefined logic expression that is associated with the redaction element type and that operates on the evaluation element of the evaluation element type;

evaluating the identified predefined logic expression by a processor, wherein the evaluating includes generating a value for the predefined logic expression;

identifying, for the predefined logic expression, a predefined permission expression that is associated with the predefined logic expression that operates on the value and that is associated with a recipient role;

evaluating the permission expression, wherein evaluating the permission expression includes identifying a redaction directive; and

applying the redaction directive to the candidate redaction element within the computer-based document prior to the computer-based document being provided to a recipient having the recipient role.

2. The method of claim 1 where the applying step comprises redacting the identified element from the computer-based document prior to the computer-based document being provided to the recipient.

3. The method of claim 1 where the applying step comprises providing the identified element within the computer-based document when the computer-based document is provided to the recipient.

4. The method of claim 1 wherein the candidate redaction element includes a textual element and identifying the candidate redaction element comprises identifying the candidate redaction element within the computer-based document in accordance with a predefined textual extraction rule.

5. The method of claim 1 where the identifying the predefined logic expression comprises identifying a predefined logic expression that includes Boolean logic.

6. The method of claim 1 where the identifying the predefined logic expression comprises identifying a predefined logic expression derived from any of company policy and a legal regulation.

7. The method of claim 1 where the evaluating the predefined logic expression comprises generating any of a “

true”

value, a “

false”

value, and the candidate redaction element.

8. The method of claim 1 and further comprising:

providing a redaction profile for human review, where the redaction profile includes information regarding any of the candidate redaction element, redaction element type, evaluation elements, evaluation element types, at least one logic expression, values, permission expression, recipient role, redaction directive, and recipient; and

receiving any of approval and disapproval of the application of the redaction directive to the computer-based document.

9. A computer system comprising:

a processor; and

a computer-readable storage medium operatively coupled to the processor, wherein the storage medium has stored thereon a document redaction program for controlling the processor, and wherein the processor is operative with the program to provide;

a redaction candidate identifier configured to identify within a computer-based document stored on a computer-readable storage medium, a candidate redaction element of a predefined redaction element type;

an evaluation element identifier configured to identify an evaluation element within the document of a predefined evaluation element type and associated with the candidate redaction element, wherein the evaluation element of the candidate redaction element associates one evaluation element type of information with the candidate redaction element;

an expression selector configured to

identify a predefined logic expression that is associated with the redaction element type and that operates on the evaluation element of the evaluation element type, and

evaluate the identified predefined logic expression,

wherein the evaluating includes generating a value for the predefined logical expression;

a permission selector configured to

identify, for the predefined logic expression, a predefined permission expression that is associated with the predefined logic expression, that operates on the value and that is associated with a recipient role, and

evaluate the permission expression, wherein evaluating the permission expression includes identifying a redaction directive; and

a document processor configured to apply the redaction directive to the candidate redaction element within the computer-based document prior to the computer-based document being provided to a recipient having the recipient role.

10. The system of claim 9 where the document processor is configured to redact the identified element from the computer-based document prior to the computer-based document being provided to the recipient.

11. The system of claim 9 where the document processor is configured to provide the identified element within the computer-based document when the computer-based document is provided to the recipient.

12. The system of claim 9 where the candidate redaction element includes a textual element and the redaction candidate identifier configured to identify a candidate redaction element of a predefined redaction element type is further configured to identify the candidate redaction element within the computer-based document in accordance with a predefined textual extraction rule.

13. The system of claim 9 where the predefined logic expression includes Boolean logic.

14. The system of claim 9 where the predefined logic expression is derived from any of company policy and a legal regulation.

15. The system of claim 9 where the expression selector configured to evaluate the predefined logic expressions to generate any of a “

true”

value, a “

false”

value, and the candidate redaction element.

16. The system of claim 9 where the document processor is configured to

provide a redaction profile for human review, where the redaction profile includes information regarding any of the candidate redaction element, redaction element type, evaluation elements, evaluation element types, at least one logic expression, values, permission expression, recipient role, redaction directive, and recipient, and

receive any of approval and disapproval of the application of the redaction directive to the computer-based document.

17. The system of claim 9, where the redaction candidate identifier, evaluation element identifier, expression selector, permission selector, and document processor are embodied in any of

a) computer hardware, and

b) computer software embodied in a computer-readable storage medium.

18. A computer program product for document redaction, the computer program product comprising:

a computer-readable storage medium; and

computer-readable program code embodied in the computer-readable storage medium, where the computer-readable program code is configured to cause a computer system to implement a method comprising;

identifying within a computer-based document stored on a computer-readable storage medium, a candidate redaction element that is of a predefined redaction element type;

identifying an evaluation element in the document of a predefined evaluation element type and associated with the candidate redaction element, wherein the evaluation element of the candidate redaction element associates one evaluation element type of information with the candidate redaction element;

identifying a predefined logic expression that is associated with the redaction element type and that operates on the evaluation elements of the evaluation element type;

evaluating the identified predefined logic expression, wherein the evaluating includes generating a value for the predefined logic expression;

identifying, for the predefined logic expressions, a predefined permission expression that is associated with the predefined logic expression, that operates on the value and that is associated with a recipient role;

evaluating the permission expression, wherein evaluating the permission expression includes identifying a redaction directive; and

applying the redaction directive to the candidate redaction element within the computer-based document prior to the computer-based document being provided to a recipient having the recipient role.

19. The computer program product of claim 18 where the computer-readable program code is configured to cause the computer system to redact the identified element from the computer-based document prior to the computer-based document being provided to the recipient.

20. The computer program product of claim 18 where the computer-readable program code is configured to cause the computer system to provide the identified element within the computer-based document when the computer-based document is provided to the recipient.

21. The computer program product of claim 18 wherein the candidate redaction element includes a textual element and wherein the computer-readable program code configured to identify the candidate redaction element is further configured to identify the candidate redaction element within the computer-based document in accordance with a predefined textual extraction rule.