AT275201B - Circuit arrangement for identifying or checking the authenticity of information present as a time-variable electrical analog signal - Google Patents

Circuit arrangement for identifying or checking the authenticity of information present as a time-variable electrical analog signal

Info

Publication number
AT275201B
AT275201B AT490068A AT490068A AT275201B AT 275201 B AT275201 B AT 275201B AT 490068 A AT490068 A AT 490068A AT 490068 A AT490068 A AT 490068A AT 275201 B AT275201 B AT 275201B
Authority
AT
Austria
Prior art keywords
authenticity
checking
identifying
analog signal
time
Prior art date
Application number
AT490068A
Other languages
German (de)
Inventor
Peter E Herrli
Original Assignee
Sodeco Compteurs De Geneve
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 Sodeco Compteurs De Geneve filed Critical Sodeco Compteurs De Geneve
Application granted granted Critical
Publication of AT275201B publication Critical patent/AT275201B/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manipulation Of Pulses (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
AT490068A 1967-06-15 1968-05-21 Circuit arrangement for identifying or checking the authenticity of information present as a time-variable electrical analog signal AT275201B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH851067A CH475599A (en) 1967-06-15 1967-06-15 Circuit arrangement for identifying information present as a time-variable electrical analog signal

Publications (1)

Publication Number Publication Date
AT275201B true AT275201B (en) 1969-10-10

Family

ID=4341365

Family Applications (1)

Application Number Title Priority Date Filing Date
AT490068A AT275201B (en) 1967-06-15 1968-05-21 Circuit arrangement for identifying or checking the authenticity of information present as a time-variable electrical analog signal

Country Status (4)

Country Link
AT (1) AT275201B (en)
CH (1) CH475599A (en)
FR (1) FR1580269A (en)
GB (1) GB1235384A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4297836B2 (en) * 2003-09-10 2009-07-15 三洋電機株式会社 Consumable parts and identification device thereof

Also Published As

Publication number Publication date
DE1774344A1 (en) 1971-06-24
DE1774344B2 (en) 1975-05-22
FR1580269A (en) 1969-09-05
GB1235384A (en) 1971-06-16
CH475599A (en) 1969-07-15

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