AU4154285A - Security system - Google Patents

Security system

Info

Publication number
AU4154285A
AU4154285A AU41542/85A AU4154285A AU4154285A AU 4154285 A AU4154285 A AU 4154285A AU 41542/85 A AU41542/85 A AU 41542/85A AU 4154285 A AU4154285 A AU 4154285A AU 4154285 A AU4154285 A AU 4154285A
Authority
AU
Australia
Prior art keywords
security system
security
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.)
Abandoned
Application number
AU41542/85A
Inventor
Frost Barry John
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.)
Frost B J
Original Assignee
Frost B J
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
Priority claimed from GB848425017A external-priority patent/GB8425017D0/en
Application filed by Frost B J filed Critical Frost B J
Publication of AU4154285A publication Critical patent/AU4154285A/en
Abandoned 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Record Information Processing For Printing (AREA)
  • Storage Device Security (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Controls And Circuits For Display Device (AREA)
AU41542/85A 1984-04-04 1985-04-01 Security system Abandoned AU4154285A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8408603 1984-04-04
GB8408603 1984-04-04
GB848425017A GB8425017D0 (en) 1984-10-03 1984-10-03 Security systems
GB8425017 1984-10-03

Publications (1)

Publication Number Publication Date
AU4154285A true AU4154285A (en) 1985-11-01

Family

ID=26287554

Family Applications (1)

Application Number Title Priority Date Filing Date
AU41542/85A Abandoned AU4154285A (en) 1984-04-04 1985-04-01 Security system

Country Status (6)

Country Link
EP (1) EP0176538A1 (en)
AU (1) AU4154285A (en)
CA (1) CA1232080A (en)
ES (1) ES8802093A1 (en)
IL (1) IL74782A0 (en)
WO (1) WO1985004746A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH555577A (en) * 1972-06-09 1974-10-31 Gretag Ag METHOD AND DEVICE FOR CONVERTING CLEAR GRAPHICAL INFORMATION INTO ENCRYPTED GRAPHICAL INFORMATION AND REVERSE
US3814904A (en) * 1972-10-20 1974-06-04 Rca Corp Cryptographically coded cards employing synthetic light modifying portion
US3937565A (en) * 1974-06-03 1976-02-10 Alasia Alfred Victor Process of coding indicia and product produced thereby
GB2101376B (en) * 1981-07-11 1986-05-21 John Gordon Lawrence Method and apparatus for use against counterfeiting

Also Published As

Publication number Publication date
ES8802093A1 (en) 1987-01-16
CA1232080A (en) 1988-01-26
WO1985004746A1 (en) 1985-10-24
IL74782A0 (en) 1985-07-31
EP0176538A1 (en) 1986-04-09
ES541987A0 (en) 1987-01-16

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