DE69231846D1 - Authentifizierung einer Dokumentenkopie - Google Patents

Authentifizierung einer Dokumentenkopie

Info

Publication number
DE69231846D1
DE69231846D1 DE69231846T DE69231846T DE69231846D1 DE 69231846 D1 DE69231846 D1 DE 69231846D1 DE 69231846 T DE69231846 T DE 69231846T DE 69231846 T DE69231846 T DE 69231846T DE 69231846 D1 DE69231846 D1 DE 69231846D1
Authority
DE
Germany
Prior art keywords
authentication
copy
document
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69231846T
Other languages
English (en)
Other versions
DE69231846T2 (de
Inventor
Ralph C Merkle
Dan S Bloomberg
John S Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of DE69231846D1 publication Critical patent/DE69231846D1/de
Publication of DE69231846T2 publication Critical patent/DE69231846T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/221—Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G07D7/0047—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using checkcodes, e.g. coded numbers derived from serial number and denomination
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
DE69231846T 1991-12-19 1992-12-10 Authentifizierung einer Dokumentenkopie Expired - Fee Related DE69231846T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/810,644 US5157726A (en) 1991-12-19 1991-12-19 Document copy authentication

Publications (2)

Publication Number Publication Date
DE69231846D1 true DE69231846D1 (de) 2001-07-05
DE69231846T2 DE69231846T2 (de) 2001-09-13

Family

ID=25204329

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69231846T Expired - Fee Related DE69231846T2 (de) 1991-12-19 1992-12-10 Authentifizierung einer Dokumentenkopie

Country Status (4)

Country Link
US (1) US5157726A (de)
EP (1) EP0547837B1 (de)
JP (1) JPH06176036A (de)
DE (1) DE69231846T2 (de)

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Also Published As

Publication number Publication date
EP0547837A2 (de) 1993-06-23
JPH06176036A (ja) 1994-06-24
US5157726A (en) 1992-10-20
EP0547837A3 (en) 1994-07-13
DE69231846T2 (de) 2001-09-13
EP0547837B1 (de) 2001-05-30

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