CA991995A - Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa - Google Patents

Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa

Info

Publication number
CA991995A
CA991995A CA173,462A CA173462A CA991995A CA 991995 A CA991995 A CA 991995A CA 173462 A CA173462 A CA 173462A CA 991995 A CA991995 A CA 991995A
Authority
CA
Canada
Prior art keywords
graphical
information
ciphered
conversion
vice versa
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
Application number
CA173,462A
Other languages
English (en)
Other versions
CA173462S (en
Inventor
Kurt Ehrat
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.)
Gretag AG
Original Assignee
Gretag AG
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 Gretag AG filed Critical Gretag AG
Application granted granted Critical
Publication of CA991995A publication Critical patent/CA991995A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C5/00—Ciphering apparatus or methods not provided for in the preceding groups, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/22—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder
    • G07C9/24—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder by means of a handwritten signature
    • G07C9/243—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder by means of a handwritten signature visually, e.g. by comparing in a viewer the written signature with a reference on the pass

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Collating Specific Patterns (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Character Input (AREA)
CA173,462A 1972-06-09 1973-06-07 Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa Expired CA991995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH859272A CH555577A (de) 1972-06-09 1972-06-09 Verfahren und vorrichtung zur umwandlung graphischer klarinformation in chiffrierte graphische information und umgekehrt.

Publications (1)

Publication Number Publication Date
CA991995A true CA991995A (en) 1976-06-29

Family

ID=4342370

Family Applications (1)

Application Number Title Priority Date Filing Date
CA173,462A Expired CA991995A (en) 1972-06-09 1973-06-07 Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa

Country Status (5)

Country Link
JP (1) JPS4985941A (de)
CA (1) CA991995A (de)
CH (1) CH555577A (de)
DE (1) DE2231242A1 (de)
GB (1) GB1428469A (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1074184B (it) * 1976-11-03 1985-04-17 Mario Marco De Gasperi Sistema per la realizzazione e la verifica della autenticita' di documenti di identificazione
US4202626A (en) * 1978-02-24 1980-05-13 A Patent Partnership Signature verification and authentication systems
US4454610A (en) * 1978-05-19 1984-06-12 Transaction Sciences Corporation Methods and apparatus for the automatic classification of patterns
ATE16136T1 (de) * 1978-05-19 1985-11-15 Transaction Sciences Corp System zum pruefen einer unterschrift und verfahren zur herstellung eines dokuments fuer einen autorisierten benutzer.
DE2826469C2 (de) * 1978-06-16 1982-12-02 The Grey Lab. Establishment, 9490 Vaduz Verfahren und Einrichtung zur Absicherung von Dokumenten
EP0042361A1 (de) * 1980-06-17 1981-12-23 GRETAG Aktiengesellschaft Verfahren und Vorrichtung zur maschinellen Identifikation von Edelsteinen
JPS60136869A (ja) * 1983-12-26 1985-07-20 Hitachi Ltd 本人認証方式
WO1985004746A1 (en) * 1984-04-04 1985-10-24 Barry John Frost Security system
US4835713A (en) * 1985-08-06 1989-05-30 Pitney Bowes Inc. Postage meter with coded graphic information in the indicia
FR2592197A1 (fr) * 1985-12-19 1987-06-26 Nixon John Procede d'identification d'une personne, notamment d'un demandeur d'un service tel que par exemple d'une transaction bancaire, a l'aide d'une piece d'identification, dispositif de mise en oeuvre du procede, des pieces d'identification utilisables pour le procede precite et procede pour la realisation de telles pieces
GB2282563A (en) * 1993-10-07 1995-04-12 Central Research Lab Ltd A composite image arrangement for documents of value

Also Published As

Publication number Publication date
JPS4985941A (de) 1974-08-17
GB1428469A (en) 1976-03-17
CH555577A (de) 1974-10-31
DE2231242A1 (de) 1973-12-20

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