Document authentication using a mark that is separate from document information

• US 6,496,933 B1
• Filed: 10/14/1998
• Issued: 12/17/2002
• Est. Priority Date: 10/14/1998
• Status: Expired due to Fees

• Current Assignee: Canon Sales Co., Inc. (Canon Inc.), Canon USA, Inc. (Canon Inc.)
• Original Assignee: Canon USA, Inc. (Canon Inc.)
• Inventors: Nunally, Patrick OʼNeal
• Primary Examiner(s): Smithers, Matthew
• Application Number:
  US09/173,086
• Time in Patent Office: 1,525 Days
• Field of Search: 713/176, 713/180, 380/46, 380/54, 380/205, 380/207, 380/243, 382/173, 382/181
• US Class Current: 713/176
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 2201/3236 Details of authentication information generation

Abstract

A digital mark is derived or created for placement on a document to identify, authenticate, or verify the document'"'"'s origins. Private information is received and digitized. The digitized private information is scrambled in response to the document'"'"'s contents. The scrambled private information is formed into a mark. The mark is placed on or in the document, apart from the document'"'"'s information.

Claims

1. A computer-executed method of processing information of a document to create an identification mark, comprising:

receiving private information;

processing the private information to obtain a digital representation of the private information;

processing the document information to obtain a digital representation of the document information;

seeding a randomizer with the digital representation of the private information;

causing the randomizer to scramble the digital representation of the private information in response to the digital representation of the document information; and

producing an image of the scrambled private information.

2. The method of claim 1, wherein processing the private information includes encrypting the private information.

3. The method of claim 1, further including placing the image of the scrambled private information on the document.

4. The method of claim 1, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

5. The method of claim 4, further including placing the blaze on the document.

6. The method of claim 5, wherein the blaze is placed substantially apart from the information of the document.

7. The method of claim 1, wherein the scrambler includes a linear feedback shift register (LFSR).

8. The method of claim 7, wherein causing the randomizer to scramble includes clocking the LFSR in response to the digital representation of the document information.

9. The method of claim 8, wherein processing the private information includes encrypting the private information.

10. The method of claim 8, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

11. The method of claim 10, further including placing the blaze on the document.

12. A computer-executed method of processing information of a document to create an identification mark, comprising:

receiving private information;

processing the private information to obtain a numeric representation of the private information;

processing the document information to obtain a numeric representation of the document information;

seeding a randomizer with the numeric representation of the private information;

causing the randomizer to scramble the numeric representation of the private information in response to the numeric representation of the document information; and

producing an image of the scrambled private information.

13. The method of claim 12, wherein processing the private information includes encrypting the private information.

14. The method of claim 12, further including placing the image of the scrambled private information on the document.

15. The method of claim 12, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

16. The method of claim 15, further including placing the blaze on the document.

17. The method of claim 16, wherein the blaze is placed substantially apart from the information of the document.

18. The method of claim 12, wherein the scrambler includes a linear feedback shift register (LFSR).

19. The method of claim 18, wherein causing the randomizer to scramble includes clocking the LFSR in response to the numeric representation of the document information.

20. The method of claim 19, wherein processing the private information includes encrypting the private information.

21. The method of claim 19, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

22. The method of claim 21, further including placing the blaze on the document.

23. A program product including a storage medium and executable instructions stored in the medium for processing information of a document to create an identification mark by:

receiving private information;

processing the private information to obtain a digital representation of the private information;

processing the document information to obtain a digital representation of the document information;

seeding a randomizer with the digital representation of the private information;

causing the randomizer to scramble the digital representation of the private information in response to the digital representation of the document information; and

producing an image of the scrambled private information.

24. The product of claim 23, wherein processing the private information includes encrypting the private information.

25. The product of claim 23, further including placing the image of the scrambled private information on the document.

26. The product of claim 23, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

27. The product of claim 26, further including placing the blaze on the document.

28. The product of claim 27, wherein the blaze is placed substantially apart from the information of the document.

29. The product of claim 23, wherein the scrambler includes a linear feedback shift register (LFSR).

30. The product of claim 29, wherein causing the randomizer to scramble includes clocking the LFSR in response to the digital representation of the document information.

31. The product of claim 30, wherein processing the private information includes encrypting the private information.

32. The product of claim 30, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

33. The product of claim 32, further including placing the blaze on the document.

34. A program product including a storage medium and executable instructions stored on the medium for processing information of a document to create an identification mark, comprising:

receiving private information;

processing the private information to obtain a numeric representation of the private information;

processing the document information to obtain a numeric representation of the document information;

seeding a randomizer with the numeric representation of the private information;

causing the randomizer to scramble the numeric representation of the private information in response to the numeric representation of the document information; and

producing an image of the scrambled private information.

35. The product of claim 34, wherein the step of processing the private information includes encrypting the private information.

36. The product of claim 34, further including placing the image of the scrambled private information on the document.

37. The product of claim 34, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

38. The product of claim 37, further including placing the blaze on the document.

39. The product of claim 38, wherein the blaze is placed substantially apart from the information of the document.

40. The product of claim 34, wherein the scrambler includes a linear feedback shift register (LFSR).

41. The product of claim 40, wherein causing the randomizer to scramble includes clocking the LFSR in response to the numeric representation of the document information.

42. The product of claim 41, wherein processing the private information includes encrypting the private information.

43. The product of claim 41, wherein the image of the scrambled information has a granularity, the method further including producing a blaze by reducing the granularity of the image of the scrambled private information.

44. The product of claim 43, further including placing the blaze on the document.

45. A device for processing information of a document to produce an identification mark in response to private information, comprising:

first means for providing a first digital representation of the private information;

second means for providing a second digital representation of the document information;

a randomizer for scrambling the first digital representation in response to the second representation to produce a third digital representation of scrambled private information; and

third means for providing an image of the third digital representation.

46. The device of claim 45, further including means for encrypting the private information, the first means for scrambling encrypted private information.

47. The device of claim 45, further including fourth means for changing the granularity of the image of the third digital representation.

48. The device of claim 45, wherein the randomizer is a linear feedback shift register.

49. A device for processing information of a document to create an identification mark, comprising;

first means for providing a first numeric representation of the private information;

second means for providing a second numeric representation of the document information;

a randomizer for scrambling the first numeric representation in response to the second numeric representation to produce a third numeric representation of scrambled, private information; and

third means for providing an image of the third numeric representation.

50. The device of claim 49, further including means for encrypting the private information, the first means for scrambling encrypted private information.

51. The device of claim 49, further including fourth means for changing the granularity of the image of the third digital representation.

52. The device of claim 49, wherein the randomizer is a linear feedback shift register.