Method and system for copy protection of displayed data content

• US 6,993,662 B2
• Filed: 11/28/2001
• Issued: 01/31/2006
• Est. Priority Date: 06/14/1998
• Status: Expired due to Term

• Current Assignee: Kioba Processing, LLC (IP Investments Group LLC)
• Original Assignee: Finjan Software Limited (SoftBank Group Corp.)
• Inventors: Rubin, Moshe, Schreiber, Daniel
• Primary Examiner(s): Caldwell, Andrew
• Assistant Examiner(s): Henning, Matthew T.
• Application Number:
  US09/996,623
• Publication Number:
  US 20020078343A1
• Time in Patent Office: 1,525 Days
• Field of Search: 713/193, 715/501.1, 715/513, 715/516, 715/526, 715/529
• US Class Current: 715/272
• 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 string including N characters, replacing the first text string with a second text string, 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, 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 an original text string between two markers within the buffer;

replacing the original text string with an alternate text string; and

inserting a Unicode U+200E character in front of the alternate text string, and inserting Unicode U+200F characters in front of the U+200E character for any unfilled memory locations between the markers.

2. The method of claim 1 wherein the original text string is stored as a sequence of 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 the formatted page is a web page.

6. The method of claim 5 wherein the web page is an HTML page.

7. The method of claim 5 wherein the web page is an XML page.

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

9. The method of claim 8 wherein the document page is a PDF document page.

10. The method of claim 8 wherein the document page is a Word document page.

11. The method of claim 1 wherein the original text string contains encrypted text and the alternate text string contains decrypted text.

12. The method of claim 11 further comprising determining a display page layout based on the contents of the buffer.

13. 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 an original text string between two markers within the buffer; and

a text processor replacing the original text string with an alternate text string and inserting a Unicode U+200E character in front of the alternate text string, and inserting Unicode U+200F characters in front of the U+200E character for any unfilled memory locations between the markers.

14. The system of claim 13 wherein the original text string is stored as a sequence of Unicode characters.

15. The system of claim 13 wherein each marker is a Unicode U+FFFE character.

16. The system of claim 13 wherein each marker is a Unicode U+FDEF character.

17. The system of claim 13 wherein the formatted page is a web page.

18. The system of claim 17 wherein the web page is an HTML page.

19. The system of claim 17 wherein the web page is an XML page.

20. The system of claim 13 wherein the formatted page is a document page.

21. The system of claim 20 wherein the document page is a PDF document page.

22. The system of claim 20 wherein the document page is a Word document page.

23. The system of claim 20 wherein the original text string contains encrypted text and the alternate text string contains decrypted text.

24. The system of claim 23 further comprising a display layout processor determining a display page layout based on the contents of the buffer.