GB1235384A - Circuit for identifying or checking the authenticity of data in the form of a time variable analogue electric signal - Google Patents

Circuit for identifying or checking the authenticity of data in the form of a time variable analogue electric signal

Info

Publication number
GB1235384A
GB1235384A GB28752/68A GB2875268A GB1235384A GB 1235384 A GB1235384 A GB 1235384A GB 28752/68 A GB28752/68 A GB 28752/68A GB 2875268 A GB2875268 A GB 2875268A GB 1235384 A GB1235384 A GB 1235384A
Authority
GB
United Kingdom
Prior art keywords
signal
circuit
counters
authenticity
gate
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
GB28752/68A
Other languages
English (en)
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.)
Societe des Compteurs de Geneve SODECO
Original Assignee
Societe des Compteurs de Geneve SODECO
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 Societe des Compteurs de Geneve SODECO filed Critical Societe des Compteurs de Geneve SODECO
Publication of GB1235384A publication Critical patent/GB1235384A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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)
GB28752/68A 1967-06-15 1968-06-17 Circuit for identifying or checking the authenticity of data in the form of a time variable analogue electric signal Expired GB1235384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH851067A CH475599A (de) 1967-06-15 1967-06-15 Schaltungsanordnung zur Identifizierung einer als zeitlich veränderliches elektrisches Analogsignal vorliegenden Information

Publications (1)

Publication Number Publication Date
GB1235384A true GB1235384A (en) 1971-06-16

Family

ID=4341365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28752/68A Expired GB1235384A (en) 1967-06-15 1968-06-17 Circuit for identifying or checking the authenticity of data in the form of a time variable analogue electric signal

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7154255B2 (en) * 2003-09-10 2006-12-26 Sanyo Electric Co., Ltd. Consumable product and device for identifying the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7154255B2 (en) * 2003-09-10 2006-12-26 Sanyo Electric Co., Ltd. Consumable product and device for identifying the same

Also Published As

Publication number Publication date
AT275201B (de) 1969-10-10
CH475599A (de) 1969-07-15
DE1774344B2 (de) 1975-05-22
DE1774344A1 (de) 1971-06-24
FR1580269A (de) 1969-09-05

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