Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media

David P. Pappas; C. Stephen Arnold; Gideon Shalev; Carla Eunice; D. Stevenson; Stephen D. Voran; Michael E. Read; E. M. Gormley; Jim Cash; Ken Marr; James J. Ryan

doi:10.1117/12.417553

21 February 2001 Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media

David P. Pappas, C. Stephen Arnold, Gideon Shalev, Carla Eunice, D. Stevenson, Stephen D. Voran, Michael E. Read, E. M. Gormley, Jim Cash, Ken Marr, James J. Ryan

Author Affiliations +

Proceedings Volume 4232, Enabling Technologies for Law Enforcement and Security; (2001) https://doi.org/10.1117/12.417553
Event: Enabling Technologies for Law Enforcement, 2000, Boston, MA, United States

Abstract

A scanning magneto-resistance microscope was developed that allows for high resolution imaging of magnetic tapes and digital media. By using second harmonic detection to remove thermal anomalies we are able to image sufficient lengths of tape for authentication purposes and for data recovery from damaged samples. This allows for high contrast images and direct conversion of the scanned information into originally recorded analog audio waveforms or digital data.

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David P. Pappas, C. Stephen Arnold, Gideon Shalev, Carla Eunice, D. Stevenson, Stephen D. Voran, Michael E. Read, E. M. Gormley, Jim Cash, Ken Marr, and James J. Ryan "Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media", Proc. SPIE 4232, Enabling Technologies for Law Enforcement and Security, (21 February 2001); https://doi.org/10.1117/12.417553

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