Method and system for copy protection of displayed data content

• US 20050240759A1
• Filed: 06/28/2005
• Published: 10/27/2005
• Est. Priority Date: 06/14/1998
• Status: Active Grant

• Current Assignee: Kioba Processing, LLC (IP Investments Group LLC)
• Original Assignee: Finjan, Inc. (SoftBank Group Corp.)
• Inventors: Rubin, Moshe, Schreiber, Daniel
• Granted Patent: US 7,657,759 B2
• Time in Patent Office: Days
• US Class Current: 713/153
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/84 output devices, e.g. displays or monitors
• CPC Class Codes: G06F 2221/2119 Authenticating web pages, e.g. with suspicious links
• CPC Class Codes: G06F 3/12 Digital output to print unit , e.g. line printer, chain printer
• CPC Class Codes: G06F 40/103 Formatting, i.e. changing of presentation of documents automatic justification G06F40/189; automatic line break hyphenation G06F40/191
• CPC Class Codes: G06F 40/109 Font handling; Temporal or kinetic typography
• CPC Class Codes: G06F 40/126 Character encoding
• CPC Class Codes: G06Q 20/102 Bill distribution or payments
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04N 1/00244 with a server, e.g. an internet server fax-servers or the like for store and forward H04N1/324
• CPC Class Codes: H04N 1/32776 using an interactive, user-operated device, e.g. a computer terminal, mobile telephone H04N1/32782, H04N1/32784 take precedence
• CPC Class Codes: H04N 1/4426 involving separate means, e.g. a server, a magnetic card
• CPC Class Codes: H04N 1/444 to a particular document or image or part thereof
• CPC Class Codes: H04N 1/4486 using digital data encryption
• CPC Class Codes: H04N 2201/0039 Connection via a network
• CPC Class Codes: H04N 2201/3249 data relating to a linked page or object, e.g. hyperlink
• CPC Class Codes: Y10S 707/99937 Sorting
• CPC Class Codes: Y10S 707/99939 Privileged access
• CPC Class Codes: Y10S 707/99945 : Object-oriented database structure processing

Abstract

A method for altering text displayed in a formatted page, including locating a buffer of memory locations containing contents of a formatted page, locating a first text string between two markers within the buffer, the first string being an encrypted text including N characters, replacing the first text string with a second text string within the buffer, the second string being a decrypted text including M characters, where M is less than N, and inserting N-M special fill characters in the N-M unfilled memory locations between the markers within the buffer, so as to avoid the need to move the markers closer together.

Claims

1. A method for altering text displayed in a formatted page, comprising:

locating a buffer of memory locations containing contents of a formatted page;

locating a first text string between two markers within the buffer, the first string being an encrypted text including N characters;

replacing the first text string with a second text string within the buffer, the second string being a decrypted text including M characters, where M is less than N; and

inserting N-M special fill characters in the N-M unfilled memory locations between the markers within the buffer, so as to avoid the need to move the markers closer together.

2. The method of claim 1 wherein the first text string is stored as a sequence of N Unicode characters.

3. The method of claim 1 wherein each marker is a Unicode U+FFFE character.

4. The method of claim 1 wherein each marker is a Unicode U+FDEF character.

5. The method of claim 1 wherein a Unicode U+200F character is used as a special fill character.

6. The method of claim 1 wherein a Unicode U+200E character is used as a special fill character.

7. The method of claim 1 wherein the N-M special fill characters are positioned in front of the second text string.

8. The method of claim 7 wherein the special fill character adjacent to the second text string is a Unicode U+200E character, and a Unicode U+200F character is the special fill character for the rest of the N-M-1 unfilled memory locations.

9. The method of claim 1 wherein the formatted page is a web page.

10. The method of claim 9 wherein the web page is an HTML page.

11. The method of claim 9 wherein the web page is an XML page.

12. The method of claim 1 wherein the formatted page is a document page.

13. The method of claim 12 wherein the document page is a PDF document page.

14. The method of claim 12 wherein the document page is a Word document page.

15. The method of claim 1 wherein the first text string contains encrypted text and the second text string contains decrypted text.

16. The method of claim 15 further comprising determining a display page layout based on the contents of the buffer.

17. A system for altering text displayed in a formatted page, comprising:

a buffer of memory locations containing contents of a formatted page;

a search processor locating a first text string between two markers within the buffer, the first string being an encrypted text string including N characters; and

a text processor replacing the first text string with a second text string within the buffer, the second string being a decrypted text string including M characters, where M is less than N, and inserting N-M special fill characters in the N-M unfilled memory locations between the markers within the buffer, so as to avoid the need to move the markers closer together.

18. The system of claim 17 wherein the first text string is stored as a sequence of N Unicode characters.

19. The system of claim 17 wherein each marker is a Unicode U+FFFE character.

20. The system of claim 17 wherein each marker is a Unicode U+FDEF character.

21. The system of claim 17 wherein a Unicode U+200F character is used as a special fill character.

22. The system of claim 17 wherein a Unicode U+200E character is used as a special fill character.

23. The system of claim 17 wherein the N-M special fill characters are positioned in front of the second text string.

24. The system of claim 23 wherein the special fill character adjacent to the alternate text is a Unicode U+200E character, and a Unicode U+200F character is the special fill character for the rest of the N-M-1 unfilled memory locations.

25. The system of claim 17 wherein the formatted page is a web page.

26. The system of claim 25 wherein the web page is an HTML page.

27. The system of claim 25 wherein the web page is an XML page.

28. The system of claim 17 wherein the formatted page is a document page.

29. The system of claim 28 wherein the document page is a PDF document page.

30. The system of claim 28 wherein the document page is a Word document page.

31. The system of claim 17 wherein the first text string contains encrypted text and the second text string contains decrypted text.

32. The system of claim 31 further comprising a display layout processor determining a display page layout based on the contents of the buffer.

33. A computer-readable storage medium storing program code for causing a computer to perform the steps of:

locating a buffer of memory locations containing contents of a formatted page;

locating a first text string between two markers within the buffer, the first string being an encrypted text including N characters;

replacing the first text string with a second text string, the second string being a decrypted text including M characters, where M is less than N; and

inserting N-M special fill characters in the N-M unfilled memory locations between the markers, so as to avoid the need to move the markers closer together.