Method and system for electronic document certification

• US 5,982,506 A
• Filed: 09/10/1996
• Issued: 11/09/1999
• Est. Priority Date: 09/10/1996
• Status: Expired due to Term

• Current Assignee: Stamps.com, Inc.
• Original Assignee: E-Stamp Corporation (LTWC Corp.)
• Inventors: Kara, Salim G.
• Primary Examiner(s): Grant, II, Jerome
• Application Number:
  US08/711,080
• Time in Patent Office: 1,155 Days
• Field of Search: 358/400, 358/403, 358/405, 358/406, 358/407, 358/468, 358/434-439, 379/93.23, 379/93.27, 379/106.01, 379/118-120, 370/252, 370/282, 380/25, 380/49, 380/50, 380/21, 380/9, 380/4
• US Class Current: 358/405
• CPC Class Codes: G06Q 20/389 Keeping log of transactions for guaranteeing non-repudiation of a transaction
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04L 9/3236 using cryptographic hash functions
• 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 1/32133 on the same paper sheet, e.g. a facsimile page header
• CPC Class Codes: H04N 1/4486 using digital data encryption
• CPC Class Codes: H04N 2201/3215 of a time or duration
• CPC Class Codes: H04N 2201/3216 of a job size, e.g. a number of images, pages or copies, size of file, length of message
• CPC Class Codes: H04N 2201/3226 of identification information or the like, e.g. ID code, index, title, part of an image, reduced-size image
• CPC Class Codes: H04N 2201/3233 of authentication information, e.g. digital signature, watermark
• CPC Class Codes: H04N 2201/3235 Checking or certification of the authentication information, e.g. by comparison with data stored independently
• CPC Class Codes: H04N 2201/3274 Storage or retrieval of prestored additional information
• CPC Class Codes: H04N 2201/3278 Transmission

Abstract

A system and method for certified transmission of an electronic document, as verified by the generation of a certification indicia. Three embodiments of the system and method are disclosed, providing for the certified transmission of a document through an independent certification device or for direct transmission from a sender to a recipient. Furthermore, the resulting certification indicia may be generated by an independent certification device or by a portable processor at the sender or receiver'"'"'s location.

Claims

1. A system for certifiably transmitting an electronic document from a first processor-based system to a second processor-based system, said system comprising:

a first processor-based system having an electronic document stored therein, said first system also having means for summarily indicating the content of said electronic document;

a second processor-based system having means for storing a received electronic document, said second system also having means for summarily indicating the content of said received electronic document, said second system further having means for comparing said first system'"'"'s summary indication of the content of said electronic document and said second system'"'"'s summary indication of the content of said received electronic document;

a third processor-based system having means for creating a certification indicia, said certification indicia being created only upon said comparing means indicating said first and second system'"'"'s summary indication of the content of said electronic document, wherein said certification indicia comprises information selected from the group consisting of an electronic image suitable for printing by said second system and data suitable to enable said first and second systems to generate an electronic image suitable for printing;

first means for information communication between said first system and said third system; and

second means for information communication between said second system and said third system.

2. The system of claim 1, wherein said electronic document is transmitted from said first system to said second system through said third system.

3. The system of claim 1, wherein said means for creating said certification indicia further comprises means for creating a unique certification indicia for each page of said electronic document.

4. The system of claim 1, wherein said third system further comprises means for transmitting said created certification indicia to said first system.

5. The system of claim 1, wherein said third system further comprises means for transmitting said created certification indicia to said second system.

6. The system of claim 1, wherein said second system further comprises:

means for integrating said created certification indicia into said decrypted electronic document; and

means for printing said integrated decrypted electronic document and generated certification indicia.

7. The system of claim 1, wherein said first information communication means comprises a public switch telephone network.

8. The system of claim 1, wherein said first information communication means comprises the Internet.

9. The system of claim 1, wherein said first information communication means comprises transmission via a cable system.

10. The system of claim 1, wherein said second information communication means comprises a public switch telephone network.

11. The system of claim 1, wherein said second information communication means comprises the Internet.

12. The system of claim 1, wherein said second information communication means comprises transmission via a cable system.

13. The system of claim 1, wherein said electronic image comprises encrypted information.

14. The system of claim 1, wherein said encrypted information comprises a machine readable bar code.

15. The system of claim 1, wherein said generated electronic image comprises encrypted information.

16. The system of claim 1, further comprising third means for information communication between said first system and said second system.

17. The system of claim 16, wherein said electronic document is transmitted from said first system to said second system via said third communication means.

18. The system of claim 16, wherein said third information communication means comprises a public switch telephone network.

19. The system of claim 16, wherein said third information communication means comprises the Internet.

20. The system of claim 16, wherein said third information communication means comprises transmission via a cable system.

21. The system of claim 1, wherein said electronic document stored in said first system is an encrypted copy of a clean text document.

22. The system of claim 21, wherein said third system comprises a cryptographic key set, said key set having at least an encryption key and a decryption key corresponding to said encryption key, said encryption key being provided to said first system for encryption of said clean text document, said decryption key being provided to said second system for decryption of said received encrypted document.

23. A system for certifiably transmitting an electronic document from a first processor-based system directly to a second processor-based system, said system comprising:

a first processor based system;

a second processor based system;

means for information communication between said first system and said second system;

said first system comprising;

an electronic document stored therein;

means for summarily indicating the content of said electronic document; and

means for transmitting said electronic document and said summary indication of the content to said second system;

said second system comprising;

means for storing said received electronic document and said summary indication of the content;

means for summarily indicating the content of said received electronic document;

means for comparing said first system'"'"'s summary indication of the content of said electronic document and said second system'"'"'s summary indication of the content of said received electronic document;

means for creating a certification indicia, said certification indicia being created only upon said comparing means validating said first and second system'"'"'s summary indication of the content of said electronic document; and

means for transmitting said created certification indicia to said first system.

24. The system of claim 23, wherein said electronic document stored in said first system is an encrypted copy of a clean text document.

25. The system of claim 23, wherein said means for creating said certification indicia further comprises means for creating a unique certification indicia for each page of said electronic document.

26. The system of claim 23, wherein said second system further comprises:

means for integrating said created certification indicia into said decrypted electronic document; and

means for printing said integrated decrypted electronic document and generated certification indicia.

27. The system of claim 23, wherein said information communication means comprises a public switch telephone network.

28. The system of claim 23, wherein said first communication information means comprises the Internet.

29. The system of claim 23, wherein said first communication information means comprises transmission via a cable system.

30. The system of claim 23, wherein said second communication information means comprises a public switch telephone network.

31. The system of claim 23, wherein said second communication information means comprises the Internet.

32. The system of claim 23, wherein said second communication information means comprises transmission via a cable system.

33. The system of claim 23, wherein said certification indicia comprises data suitable to enable said first and second systems to generate an electronic image suitable for printing.

34. The system of claim 33, wherein said generated electronic image comprises encrypted information.

35. The system of claim 23, wherein said certification indicia comprises an electronic image suitable for printing by said second system.

36. The system of claim 35, wherein said electronic image comprises encrypted information.

37. The system of claim 36, wherein said encrypted information comprises a machine readable bar code.

38. The system of claim 23, wherein said first system further comprises a first portable processor removably coupled thereto.

39. The system of claim 38, wherein said first portable processor is a TMU button.

40. The system of claim 38, wherein said first portable processor comprises a cryptographic key set, said key set having at least an encryption key and a decryption key corresponding to said encryption key, said encryption key being utilized for encryption of said clean text document, said decryption key being utilized by said second system for decryption of said received encrypted document.

41. The system of claim 23, wherein said second system further comprises a second portable processor coupled thereto, said second portable processor comprising said means for creating a certification indicia.

42. The system of claim 41, wherein said second portable processor is a TMU button.

43. A system for certifiably transmitting an electronic document from a first processor-based system directly to a second processor-based system, said system comprising:

a first processor-based system;

a second processor-based system; and

means for information communication between said first system and said second system;

said first system comprising;

means for identifying an electronic document to certifiably transmit;

means for encrypting said electronic document;

means for generating a checksum of said encrypted electronic document;

means for transmitting said encrypted electronic document and said generated checksum via said communication means to said second system; and

means for receiving a certification indica via said communication means from said second system;

said second system comprising;

means for receiving said encrypted electronic document and said checksum from said first system;

means for generating a checksum of said received encrypted electronic document;

means for determining if said generated checksum and said received checksum are the same;

means for generating said certification indicia if said generated checksum and said received checksum are the same; and

means for transmitting said certification indicia to said first system.

44. The system of claim 43, wherein said encrypting means comprises a first portable processor coupled to said first system.

45. The system of claim 44, wherein said first portable processor is a TMU button.

46. The system of claim 43, wherein said means for generating said certification indicia further comprises:

means for generating a certification indicia for each page of said electronic document; and

means for integrating the certification indicia associated with a particular page of said electronic document with that particular page of said electronic document.

47. The system of claim 43, wherein said information communication means comprise a public switch telephone network.

48. The system of claim 43, wherein said information communication means comprise the Internet.

49. The system of claim 43, wherein said information communication means comprise transmission via a cable system.

50. The system of claim 43, wherein said certification indicia comprises information identifying said first system.

51. The system of claim 43, wherein said certification indicia comprises information identifying said second system.

52. The system of claim 43, wherein said certification indicia comprises information identifying the date and time of receipt of said encrypted electronic document by said second system.

53. The system of claim 43, wherein said means for generating said certification indicia comprises a second portable processor coupled to said second system.

54. The system of claim 53, wherein said second portable processor is a TMU button.

55. The system of claim 43, wherein said second system further comprises:

means for decrypting said received encrypted electronic document; and

means for integrating said generated certification indicia into said decrypted electronic document.

56. The system of claim 55, wherein said second system further comprises means for printing said integrated decrypted electronic document and generated certification indicia.

57. The system of claim 43, wherein said means for generating said certification indicia further comprises means for determining unique transaction identification information.

58. The system of claim 57, wherein said certification indicia comprises said unique transaction identification information.

59. The system of claim 43, wherein said certification indicia comprises an electronic image suitable for printing by said second system.

60. The system of claim 59, wherein said electronic image comprises encrypted information.

61. The system of claim 60, wherein said encrypted information comprises a machine readable bar code.

62. The system of claim 43, wherein said certification indicia comprises data suitable to enable said first and second systems to generate an electronic image suitable for printing.

63. The system of claim 62, wherein said generated electronic image comprises encrypted information.

64. A system for certifiably transmitting an electronic document from a first processor-based system to a second processor-based system, said system comprising:

a first processor-based system;

a second processor-based system;

a third processor-based system having means for generating a certification indicia;

first means for information communication between said first system and said third system; and

second means for information communication between said second system and said third system;

said first system comprising;

means for identifying an electronic document to certifiably transmit;

means for encrypting said electronic document, said encrypting means comprising a public encryption key provided said first system by said third system via said first communication means;

means for generating a first checksum of said encrypted electronic document;

means for generating a first cipher including said first checksum;

means for transmitting said encrypted electronic document and said first cipher to said third system via said first communication means; and

means for receiving a certification indicia generated in response to said transmission of said encrypted electronic document via said first communication means;

said third system comprising;

means for receiving said encrypted electronic document and said first checksum via said first communication means;

means for generating a third checksum of said received encrypted electronic document;

means for determining if said third checksum and said first checksum are the same;

means for transmitting said third checksum and said encrypted electronic document to said second system via said second communication means;

means for receiving a second cipher from said second system via said second communication means;

means for determining if said second system received the same encrypted electronic document transmitted by said third system;

means for generating said certification indicia if said second system received the same encrypted electronic document transmitted by said third system;

means for transmitting said certification indicia to said first system via said first communication means; and

means for transmitting said certification indicia to said second system via said second communication means;

said second system comprising;

means for receiving said encrypted electronic document and said checksum from said third system via said second communication means;

means for generating a second checksum of said received encrypted electronic document;

means for determining if said second checksum and said received third checksum are the same;

means for generating a second cipher including said second checksum;

means for transmitting said second cipher to said third system via said second communication means; and

means for receiving said certification indicia from said third system via said second communication means.

65. A system for certifiably transmitting an electronic document from a first processor-based system to a second processor-based system, said system comprising:

a first processor-based system having at least one electronic document stored thereon, said first system also having a first portable processor removably coupled thereto;

a second processor-based system having means for generating a certification indicia, said second system also having a second portable processor removably coupled thereto; and

means for information communication between said first system and said second system;

said first system comprising;

means for identifying ones of said at least one electronic document to certifiably transmit;

means for extracting a cryptographic key set from said first portable processor, said cryptographic key set having at least one encryption key and a decryption key associated with said encryption key;

means for encrypting said electronic document, said encrypting means utilizing said encryption key extracted from said first portable processor;

means for generating a first checksum of said encrypted electronic document;

means for generating a first cipher including said first checksum;

means for transmitting said encrypted electronic document and said first cipher to said second system via said communication means;

means for receiving a certification indicia generated in response to said transmission of said encrypted electronic document from said second system via said communication means; and

means for transmitting said decryption key to said second system upon receipt of said certification indicia;

said second system comprising;

means for receiving said encrypted electronic document and said first cipher from said first system via said communication means;

means for generating a second checksum of said received encrypted electronic document;

means for determining if said second checksum and said first checksum are the same;

means for generating a second cipher suitable to enable said second portable processor to generate said certification indicia;

means for communicating said second cipher to said second portable processor;

means, operable on said second portable processor, for generating said certification indicia if said first checksum and said second checksum are equivalent;

means for extracting said certification indicia from said second portable processor;

means for transmitting said certification indicia to said first system via said communication means; and

means for receiving said decryption key from said first system via said communication means.

66. A method for certifiably transmitting an electronic document from a first processor-based system to a second processor-based system, said method comprising the steps of:

transmitting an electronic document from said first system to said second system, said transmitting step comprising the substeps of;

generating a first checksum of an electronic document stored on said first system;

temporarily coupling said first system to a second system to provide information communication between said first system and said second system;

transmitting said electronic document and said first checksum from said first system to said second system;

receiving a certification indicia at said first system from said second system;

receiving an electronic document at said second system transmitted from said first system, said receiving step comprising the substeps of;

receiving said electronic document and said first checksum from said first system at said second system;

generating a second checksum of said electronic document;

determining if said second checksum and said first checksum are the same;

coupling a second portable processor to said second system, said second portable processor having stored therein an algorithm for generation and dissemination of a certification indicia;

extracting said certification indicia from said second portable processor by said second system; and

transmitting said certification indicia from said second system to said first system.

67. The method of claim 66, wherein said transmitting step further comprises the substeps of:

coupling a first portable processor to said first system, said portable processor having stored therein an algorithm for generation and dissemination of cryptographic keys;

extracting an encryption key of said cryptographic keys from said first portable processor by said first system, said encryption key having at least one decryption key associated therewith;

encrypting said electronic document stored on said first system, said encrypting step utilizing said encryption key extracted from said first portable processor;

extracting a decryption key of said cryptographic keys from said first portable processor by said first system, said decryption key being associated with said encryption key; and

transmitting said decryption key to said second system after receipt of said certification indicia at said first system from said second system.

68. The method of claim 67, wherein said receiving step further comprises the substep of receiving said decryption key at said second system from said first system.

69. A certification apparatus for certifying the transmission of an electronic document from a first processor-based system to a second processor-based system, said apparatus comprising:

means for temporarily coupling said certification apparatus to said first system, said coupling means providing information communication between said certification apparatus and said first system;

means for temporarily coupling said certification apparatus to said second system, said coupling means providing information communication between said certification apparatus and said second system;

means for verifying that an electronic document transmitted from said first system contains substantially the same information as an electronic document received by said second system; and

means for generating an indicia of certification when said verifying means indicates said electronic document transmitted from said first system contains substantially the same information as said electronic document received by said second system.

70. A system comprising a portable processor for certifying the transmission of an electronic document from a first processor-based system to a second processor-based system, said system comprising:

means for temporarily coupling said portable processor to said second system, said coupling means providing information communication between said portable processor and said second system;

means for verifying that an electronic document transmitted from said first system contains substantially the same information as an electronic document received by said second system; and

means, operable on said portable processor, for generating an indicia of certification when said verifying means indicates said electronic document transmitted from said first system contains substantially the same information as said electronic document received by said second system.