VERIFICATION SYTSEM FOR MAGNETICALLY-WRITTEN DATA

VERIFICATION SYTSEM FOR MAGNETICALLY-WRITTEN DATA

A method of verifying the accuracy or authenticity of alphanumeric magnetic data on a document, wherein the configuration of a pictorial or graphic magnetic reference image in the document is made visible by bringing movable particulate magnetic material into proximity therewith such that the partic...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: SAUNDERS, RICHARD DAVID
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
CINEMATOGRAPHY
COMPUTING
COUNTING
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HANDLING RECORD CARRIERS
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Beschreibung
Zusammenfassung:A method of verifying the accuracy or authenticity of alphanumeric magnetic data on a document, wherein the configuration of a pictorial or graphic magnetic reference image in the document is made visible by bringing movable particulate magnetic material into proximity therewith such that the particulate magnetic material takes up a distribution corresponding to the magnetic field of the reference image; and the magnetic image configuration thus revealed is compared with the reference image to identify any significant disconformity suggesting past exposure of the document to a magnetic field capable of altering said magnetic data.