METHOD AND APPARATUS FOR FINGERPRINTING AND AUTHEN

专利名称：METHOD AND APPARATUS FOR

FINGERPRINTING AND AUTHENTICATINGMAGNETIC MEDIA

发明人：INDECK, RONALD, SCOTT,MULLER, MARCEL,

WETTSTEIN,ENGEL, GEORGE,LAWRENCE,HEGE, ALAN LEE

申请号：EP94914101申请日：19940408公开号：EP0693201A4公开日：19971126

摘要：A method and apparatus is disclosed for determining the remanent noise in amagnetic medium (102) by DC saturation of a region thereof and measurement of theremaining DC magnetization. A conventional magnetic recording transducer may be usedto determine the remanent noise. Upon determination, the remanent noise may then bedigitized and recorded on the same magnetic medium to thereby 'fingerprint' themagnetic medium. This 'fingerprint' may then be later used to verify and authenticate(114) the magnetic medium as being an original. In such manner, any magnetic medium, orany object having an associated magnetic medium, may be 'fingerprinted' including creditcards, computer programs, compact discs, videotapes, cassette tapes, etc.

申请人：WASHINGTON UNIVERSITY

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