System and method for encrypting and decrypting document reproductions

• US 8,467,530 B2
• Filed: 10/05/2005
• Issued: 06/18/2013
• Est. Priority Date: 10/05/2005
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Suleiman, Mohammad A., Wei, Hongfeng
• Primary Examiner(s): McNally, Michael S
• Application Number:
  US11/243,858
• Publication Number:
  US 20070076874A1
• Time in Patent Office: 2,813 Days
• Field of Search: 380/243
• US Class Current: 380/243
• CPC Class Codes: H04N 1/00968 by scanning marks on a sheet mark-sheet input means H04N1/00355; sensing record carriers G06K7/00
• CPC Class Codes: H04N 1/32117 in a separate transmission or protocol signal prior to or subsequent to the image data transmission, e.g. in digital identification signal [DIS], in non standard setup [NSS] or in non standard field [NSF] for mode signalling H04N1/333
• 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

Abstract

The present invention is directed to a system and method for secure document transmission. A sender selects a portion of an original document containing confidential information using a highlighter, bracketing, underlining, or other identifying marks. The original document is then scanned to generate an electronic version, which is subject to optical character recognition to locate the portions of the document containing confidential information based on the identifying marks. These portions containing confidential information are then encrypted and a hybrid document containing non-encrypted portions and encrypted portions is generated. The hybrid document is then sent to a recipient, along with a decryption key. The hybrid document is then marked by the recipient to designate those areas containing encrypted information. The marked document is then scanned to generate an electronic version, which is analyzed to identify which portions require decryption based on the identifying marks made by the recipient. These portions are decrypted and a complete reproduction of the original document is generated for the recipient.

Claims

1. A method for secure document transmission comprising:

receiving a tangible document, the tangible document including humanly added indicia representative of an area in which confidential information is located;

scanning the tangible document to generate an electronic document;

encrypting the area to thereby generate an encrypted portion;

generating a hybrid electronic document inclusive of a non-encrypted portion of the electronic document and the encrypted portion;

communicating the hybrid electronic document to a selected destination;

receiving the hybrid electronic document;

receiving a humanly added annotation identifying the encrypted portion in the hybrid electronic document;

detecting the humanly added annotation to thereby identify the encrypted portion; and

decrypting the encrypted portion of the hybrid electronic document.

2. The method for secure document transmission of claim 1, further comprising:

associating the encrypted portion with an encryption key; and

selectively communicating the encryption key to the selected destination to enable decryption of the hybrid electronic document.

3. The method for secure document transmission of claim 2, wherein the step of communicating the hybrid electronic document to a selected destination further comprises:

rendering the hybrid electronic document so as to output the hybrid electronic document as a hardcopy document;

scanning the hardcopy document to generate facsimile data representative of the hybrid electronic document; and

transmitting the facsimile data to the selected destination.

4. The method for secure document transmission of claim 3, further comprising:

receiving the facsimile data; and

rendering a rendered hardcopy document of the facsimile data.

5. The method for secure document transmission of claim 1, wherein receiving the humanly added annotation further comprises scanning the rendered hardcopy including the humanly added annotation so as to generate a hybrid electronic document inclusive of the non-encrypted portion and the encrypted portion.

6. The method for secure document transmission of claim 1, wherein the humanly added annotation is at least one of the group consisting of highlighting, bracketing, and underlining.

7. A computer-readable, tangible, and non-transitory data storage medium with computer-readable instructions stored thereon for secure document transmission comprising:

instructions for receiving a tangible document, the tangible document including humanly added indicia representative of an area on the tangible document in which confidential information is located;

instructions for scanning the tangible document to generate an electronic document;

instructions for encrypting the area to thereby generate an encrypted portion;

instructions for generating a hybrid electronic document inclusive of a non-encrypted portion of the electronic document and the encrypted portion;

instructions for communicating the hybrid electronic document to a selected destination;

instructions for receiving the hybrid electronic document;

instructions for receiving the humanly added annotation identifying the encrypted portion in the hybrid electronic document;

instructions for detecting the humanly added annotation to thereby identify the encrypted portion; and

instructions for decrypting the encrypted portion of the hybrid electronic document.

8. The computer-readable medium of instructions with computer-readable instructions stored thereon for secure document transmission of claim 7, further comprising:

instructions for associating the encrypted portion with an encryption key; and

instructions for selectively communicating the encryption key to the selected destination to enable decryption of the hybrid electronic document.

9. The computer-readable medium of instructions with computer-readable instructions stored thereon for secure document transmission of claim 8, wherein the instructions for communicating the hybrid electronic document to a selected destination further comprises:

instructions for rendering the hybrid electronic document so as to output the hybrid electronic document as a hardcopy document;

instructions for scanning the hardcopy document to generate facsimile data representative of the hybrid electronic document; and

instructions for transmitting the facsimile data to the selected destination.

10. The computer-readable medium of instructions with computer-readable instructions stored thereon for secure document transmission of claim 9, further comprising:

instructions for receiving the facsimile data; and

instructions for rendering a rendered hardcopy document of the facsimile data.

11. The computer-readable medium of instructions with computer-readable instructions stored thereon for secure document transmission of claim 7, wherein the instructions for receiving the humanly added annotation comprises:

instructions for scanning the rendered hardcopy including the humanly added annotation so as to generate a hybrid electronic document inclusive of the non-encrypted portion and the encrypted portion.

12. The computer-readable medium of instructions with computer-readable instructions stored thereon for secure document transmission of claim 7, wherein the humanly added annotation is at least one of the group consisting of highlighting, bracketing, and underlining.