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CH555577A - METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE - Google Patents

METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE

Info

Publication number
CH555577A
CH555577A CH859272A CH859272A CH555577A CH 555577 A CH555577 A CH 555577A CH 859272 A CH859272 A CH 859272A CH 859272 A CH859272 A CH 859272A CH 555577 A CH555577 A CH 555577A
Authority
CH
Switzerland
Prior art keywords
graphical information
reverse
encrypted
converting
converting clear
Prior art date
Application number
CH859272A
Other languages
German (de)
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
Priority to CH859272A priority Critical patent/CH555577A/en
Priority to DE2231242A priority patent/DE2231242A1/en
Priority to CA173,462A priority patent/CA991995A/en
Priority to GB2751473A priority patent/GB1428469A/en
Priority to JP48065323A priority patent/JPS4985941A/ja
Publication of CH555577A publication Critical patent/CH555577A/en

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)
CH859272A 1972-06-09 1972-06-09 METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE CH555577A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH859272A CH555577A (en) 1972-06-09 1972-06-09 METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE
DE2231242A DE2231242A1 (en) 1972-06-09 1972-06-26 PROCESS AND DEVICE FOR THE CONVERSION OF GRAPHICAL CLEAR INFORMATION INTO ENCRYPTED INFORMATION AND REVERSE AS WELL AS PRODUCT MANUFACTURED BY THE PROCESS
CA173,462A CA991995A (en) 1972-06-09 1973-06-07 Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa
GB2751473A GB1428469A (en) 1972-06-09 1973-06-08 Method and apparatus for conversion of graphical clear information into ciphered graphical information and vice versa
JP48065323A JPS4985941A (en) 1972-06-09 1973-06-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH859272A CH555577A (en) 1972-06-09 1972-06-09 METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE

Publications (1)

Publication Number Publication Date
CH555577A true CH555577A (en) 1974-10-31

Family

ID=4342370

Family Applications (1)

Application Number Title Priority Date Filing Date
CH859272A CH555577A (en) 1972-06-09 1972-06-09 METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE

Country Status (5)

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

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1074184B (en) * 1976-11-03 1985-04-17 Mario Marco De Gasperi SYSTEM FOR THE REALIZATION AND VERIFICATION OF THE AUTHENTICITY OF IDENTIFICATION DOCUMENTS
US4202626A (en) * 1978-02-24 1980-05-13 A Patent Partnership Signature verification and authentication systems
EP0011671B1 (en) * 1978-05-19 1985-10-16 Transaction Sciences Corporation Signature verification system and method of manufacturing a document for an authorized user
US4454610A (en) * 1978-05-19 1984-06-12 Transaction Sciences Corporation Methods and apparatus for the automatic classification of patterns
DE2826469C2 (en) * 1978-06-16 1982-12-02 The Grey Lab. Establishment, 9490 Vaduz Procedure and device for securing documents
EP0042361A1 (en) * 1980-06-17 1981-12-23 GRETAG Aktiengesellschaft Method and device for machine identification of gem stones
JPS60136869A (en) * 1983-12-26 1985-07-20 Hitachi Ltd Personal identification system
EP0176538A1 (en) * 1984-04-04 1986-04-09 Frost, Barry John Security system
US4835713A (en) * 1985-08-06 1989-05-30 Pitney Bowes Inc. Postage meter with coded graphic information in the indicia
FR2592197A1 (en) * 1985-12-19 1987-06-26 Nixon John Method of identifying a person, especially a person requesting a service such as, for example, a banking transaction, with the aid of an identification card, device for implementing the method, identification cards usable for the abovementioned method and method for producing such cards
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
CA991995A (en) 1976-06-29
JPS4985941A (en) 1974-08-17
GB1428469A (en) 1976-03-17
DE2231242A1 (en) 1973-12-20

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Legal Events

Date Code Title Description
PL Patent ceased