Apparatus and method for confirming, timestamping, and archiving printer and telecopier transmissions

• US 6,188,766 B1
• Filed: 03/05/1997
• Issued: 02/13/2001
• Est. Priority Date: 03/05/1997
• Status: Expired due to Term

• Current Assignee: Hanger Solutions, LLC (IP Investments Group LLC)
• Original Assignee: Cryptography Research, Inc. (Rambus Inc.)
• Inventors: Kocher, Paul C.
• Primary Examiner(s): Hayes, Gail O.
• Assistant Examiner(s): Tucker, Christopher M.
• Application Number:
  US08/810,913
• Time in Patent Office: 1,441 Days
• Field of Search: 358/405, 358/403, 358/1, 358/2, 358/448, 358/450, 380/30, 380/51, 380/55, 380/243, 380/246, 713/178
• US Class Current: 380/246
• CPC Class Codes: H04N 1/32101 Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
• CPC Class Codes: H04N 2201/3215 of a time or duration
• CPC Class Codes: H04N 2201/3221 of a job number or identification, e.g. communication number
• CPC Class Codes: H04N 2201/3271 Printing or stamping
• CPC Class Codes: H04N 2201/3274 Storage or retrieval of prestored additional information

Abstract

The present invention provides an apparatus and method for confirming, timestamping, and archiving documents using telecopiers (e.g., facsimile machines). A user sends a document to a timestamping service via facsimile, which archives the transmission with a timestamp. A submission receipt, containing size-reduced images of the submission and a document identification value (DIV), is prepared and sent to the sender. The DIV can later be submitted to the timestamping service to obtain verification that the document was received at the indicated time. In addition, the invention allows for various other forms of document transmission, document identification, and timestamp verification. The invention is thus useful in any situation where it is desired to prove that a document was in existence at a given time. Other embodiments of the invention provide senders of facsimile and telecopier transmissions with confirmation that their transmissions were received successfully.

Claims

1. A method for allowing a user to verify the content and submission time of an archived telecopier transmission, comprising the steps of:

(a) at a computer-implemented verification service, receiving a telecopier transmission identifier from a requester;

(b) using said telecopier transmission identifier to locate at least one image, and a corresponding secure time indicator, in a digital archive;

(c) retrieving said at least one image and said secure time indicator from said archive; and

(d) sending a verification determination, including a representation of said retrieved at least one image, to said user.

2. The method of claim 1 wherein said verification determination includes size-reduced versions of at least two of said retrieved images from said digital archive.

3. The method of claim 2 wherein said verification determination specifies, in human-readable form, when said archived telecopier transmission was originally archived.

4. The method of claim 1 wherein said step of sending said verification determination is performed via facsimile.

5. The method of claim 4 wherein said verification determination is not cryptographically verifiable by said user.

6. The method of claim 1 wherein said step of sending said verification determination is performed over the world wide web.

7. The method of claim 1 wherein said step of sending verification determination is performed via e-mailing.

8. The method of claim 1 wherein said step of sending said verification determination is performed via certified mailing.

9. The method of claim 1 wherein said verification determination is sent to said user on a physical medium.

10. The method of claim 1 wherein said verification determination is not cryptographically verifiable by said user.

11. The method of claim 10 wherein said verification determination specifies, in human-readable form, when said archived telecopier transmission was originally archived.

12. The method of claim 1 further comprising the step of cryptographically verifying that said secure time indicator:

(i) is valid, and (ii) corresponds to said at least one image.

13. The method of claim 1 wherein said telecopier transmission identifier includes an image representation corresponding to said at least one said digitally archived image.

14. The method of claim 13 wherein said step of using said computer to locate said at least one archived image includes comparing said image representation from said telecopier transmission identifier against a plurality of candidate images in said archive until a sufficiently close match is determined.

15. The method of claim 1 wherein said telecopier transmission identifier includes a representation of a cryptographic key which may be used to decrypt said at least one located image.

16. The method of claim 1 wherein:

(i) said step of receiving said telecopier transmission identifier is performed via facsimile, (ii) said telecopier transmission identifier is in machine-readable form; and

(iii) said machine-readable form is decoded by computer.

17. The method of claim 16 wherein said telecopier transmission identifier is in bar-coded form.

18. The method of claim 1 wherein said step of receiving said telecopier transmission identifier is performed via a computer network.

19. The method of claim 18 wherein said step of receiving said telecopier transmission identifier is performed via operator entry using a computer terminal.

20. The method of claim 1 wherein said step of receiving said telecopier transmission identifier is performed via a telephone voice response unit.

21. The method of claim 1 wherein said telecopier transmission identifier is a human-readable, alphanumeric document identification value.

22. The method of claim 1 wherein at least one of said steps (b), (c), (d), and (e) is performed using a remote computer accessed via a communications network.

23. The method of claim 1 wherein said user is an original sender of said transmission.

24. The method of claim 1 wherein said user is other than a sender of said transmission.

25. The method of claim 1 further comprising the step of decrypting said at least one image.

26. The method of claim 1 wherein at least one of said steps (a), (b), (c), and (d) occurs in a secure facility having electronic access control.

27. The method of claim 1 further comprising the step of billing said user.

28. The method of claim 1 further comprising the step of recording information about at least one of steps (a), (b), (c), and (d) in an audit log.

29. A system for verifying the content and submission time of an archived telecopier transmission, to a user of said system, comprising:

(a) an interface for receiving a telecopier transmission identifier;

(b) a storage subsystem configured to provide;

(i) at least one image corresponding to a telecopier transmission identifier received from said interface, and (ii) a secure time indicator corresponding to said image;

(c) a receipt generator for generating a verification determination, including a representation of said image, for transmission to a user of said system.

30. The system of claim 29 wherein said interface includes a facsimile modem.

31. The system of claim 29 wherein said interface includes a computer keyboard.

32. The system of claim 31 further comprising a facsimile modem coupled to said receipt generator for said transmission of said verification determination to said user.

33. The system of claim 32 wherein said verification determination includes a human-readable representation of said secure time indicator.

34. The system of claim 29 wherein said interface is connectable to a computer network.

35. The system of claim 34 wherein said external computer network is the Internet.

36. The system of claim 29 wherein said storage subsystem includes a plurality of storage devices.

37. The system of claim 36 wherein at least two of said plurality of storage devices are physically located in separate facilities.

38. The system of claim 29 wherein at least one of said storage subsystem and said receipt generator is accessible over a computer network.

39. A method for generating a confirmation from a received telecopier transmission, comprising the steps of:

(a) receiving via telecopier from a sender an image;

(b) printing said received image on a substrate;

(c) automatically scanning said printed substrate into digital form; and

(d) sending said scanned image to said sender via telecopier.

40. The method of claim 39 further comprising the step of digitally resizing said scanned image.

41. The method of claim 40 wherein said image to print is received via facsimile;

and wherein said scanned image is sent via facsimile.

42. The method of claim 39 wherein:

(i) said received image is received via facsimile, and (ii) said scanned image is sent via facsimile.

43. The method of claim 39 further comprising the step of digitally signing said scanned image.

44. A telecopier device with automated confirmation generation capability, comprising:

(a) a first telecopier-compatible modem configured for receiving, from a sender, an image to print;

(b) a printer configured for printing said image onto a substrate;

(c) a scanner configured for scanning said substrate into digital form, after said substrate has been printed upon by said printing mechanism;

(d) a memory to store said digital form; and

(e) a second telecopier-compatible modem capable of sending, to said sender, said digital form.

45. The system of claim 44 wherein said first modem and said second modem are the same.

46. The system of claim 45 wherein said first modem and said second modem are facsimile-compatible devices.

47. The system of claim 44 further comprising a cryptographic module configured for digitally signing said digital form.