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Apparatus and method for authentication of printed documents

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04K-001/00
  • G09C-003/08
  • G09C-003/00
  • H04L-009/00
  • H04L-015/34
출원번호 US-0846818 (1997-04-30)
우선권정보 GB-0006615 (1994-05-04)
발명자 / 주소
  • Holloway Christopher J.,GBX
  • Matyas
  • Jr. Stephen Michael
출원인 / 주소
  • International Business Machines Corporation
대리인 / 주소
    Hesse
인용정보 피인용 횟수 : 164  인용 특허 : 25

초록

Printed document contents are scanned and digitized, using a conventional scanner, and displayed page by page on a screen. Using a conventional editor and an input device, the scanned and digitized document contents are edited before being used to generate a digital signature. This allows reading er

대표청구항

[ We claim:] [1.] Apparatus for authenticating a hardcopy document comprising:means for digitizing information content of a hardcopy document;means for editing a digital form of the information content of the hardcopy document, means for creating an edited digital form of the information content of

이 특허에 인용된 특허 (25)

  1. Bloomberg Dan S. (Palo Alto CA), Binary image processing for decoding self-clocking glyph shape codes.
  2. Chapman Thomas R. (5600 Woodland La. SW. Fort Lauderdale FL 33312), Counterfeit document detection system.
  3. Marshall Alan D. (Merchants Landing GB2) Mitchell Christopher J. (Warminster GB2) Proudler Graeme J. (Stoke Gifford GB2), Data authentication and protection system.
  4. Brachtl Bruno O. (Baden-Wuerttenberg NY DEX) Coppersmith Don (Ossining NY) Hyden Myrna M. (Manassas VA) Matyas ; Jr. Stephen M. (Manassas VA) Meyer Carl H. W. (Kingston NY) Oseas Jonathan (Hurley NY), Data authentication using modification detection codes based on a public one way encryption function.
  5. Haber Stuart A. (New York NY) Stornetta ; Jr. Wakefield S. (Morristown NJ), Digital document time-stamping with catenate certificate.
  6. Tucker Frank D. (Valencia CA) Nunley Leonard (Agoura CA), Document authentication method.
  7. Merkle Ralph C. (Sunnyvale CA) Bloomberg Dan S. (Palo Alto CA) Brown John S. (San Francisco CA), Document copy authentication.
  8. Matsumoto Hiroshi (Fujisawa JPX) Takaragi Kazuo (Ebina JPX) Susaki Seiichi (Yokohama JPX) Maezawa Hiroyuki (Tama JPX) Koizumi Shinobu (Sagamihara JPX), Electronic document processing system and method of forming digital signature.
  9. Virga, Richard, Encryption device.
  10. Hecht David L. (Palo Alto CA) Stearns Richard G. (Mountain View CA), Explicit synchronization for self-clocking glyph codes.
  11. Hecht David L. (Palo Alto CA) Petrie Glen W. (San Jose CA), Global addressability for self-clocking glyph codes.
  12. Moore James W. (Potomac MD), Hybrid encryption method and system for protecting reusable software components.
  13. Okano Hirokazu (1-8-6 ; Kurakake Asakita-Ku ; Hiroshima-shi ; Hiroshima JPX), Information processing system using error-correcting codes and cryptography.
  14. Son Myungsae (Rancho Santa Fe CA) Johnson Craig T. (San Diego CA) Dartez Richard M. (San Marcos CA), Method and apparatus for printing an image in a specified positional relationship with a preprinted registration mark.
  15. Walker Keith A. (Rochester NY) Koop Donald A. (Hamlin NY), Method and appratus for automatically locating predefined exposure areas in a scanned image.
  16. Salisbury Richard (Littlebury GBX), Monitoring changes in image characteristics.
  17. Bernzott Philip (Oakland CA) Dilworth John (Oakland CA) George David (Oakland CA) Higgins Bryan (Berkeley CA) Knight Jeremy (Berkeley CA), Optical character recognition method and apparatus using context analysis and a parsing algorithm which constructs a tex.
  18. Blandford Robert R. (1809 Paul Spring Rd. Alexandria VA 22307), Personal computer diary.
  19. Fischer Addison M. (60 14th Ave. S. Naples FL 33942), Public key/signature cryptosystem with enhanced digital signature certification.
  20. Fischer Addison M. (60 14th Ave. South Naples FL 33942), Public key/signature cryptosystem with enhanced digital signature certification.
  21. Hecht David L. (Palo Alto CA) Flores L. Noah (Soquel CA) Petrie Glen W. (San Jose CA) Webster Thomas M. (Mountain View CA), Random access techniques for use with self-clocking glyph codes.
  22. Wang Ynjiun P. (Stony Brook NY) Swartz Jerome (Old Field NY) McGlynn Daniel R. (Brooklyn NY), Record with encoded data.
  23. Okuno Yasuhiro (Kawasaki JPX) Yamakawa Tadashi (Yokohama JPX) Nagashima Masaaki (Kawasaki JPX) Sasaki Takayuki (Yokohama JPX) Kurosawa Takahiro (Yokohama JPX), System for detecting improper rewrites of data system for using separate reader writer passwords.
  24. Cass Todd A. (San Francisco CA) Saund Eric (San Carlos CA), System for registering component image tiles in a camera-based scanner device transcribing scene images.
  25. Garland Harry (Los Altos Hills CA) Melen Roger (Los Altos Hills CA), Unified scanner computer printer.

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