Methods of making physical unclonable functions having magnetic and non-magnetic particles

A method of making a physical unclonable function (PUF) having magnetic and non-magnetic particles is disclosed. Measuring both magnetic field and image view makes the PUF difficult to counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be...

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Bibliographische Detailangaben
Hauptverfasser:	Booth, James Ronald, Killeen, Kelly Ann, Drummond, James Paul, Denton, Gary Allen, Cannon, Roger Steven
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING BASIC ELECTRIC ELEMENTS CALCULATING CASTING CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY COMPUTING COUNTING CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HANDLING RECORD CARRIERS INDUCTANCES INFORMATION STORAGE MAGNETS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS PHYSICS POWDER METALLURGY PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS SEALS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES STATIC STORES TRANSFORMERS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION TRANSPORTING WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	A method of making a physical unclonable function (PUF) having magnetic and non-magnetic particles is disclosed. Measuring both magnetic field and image view makes the PUF difficult to counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other methods are disclosed.