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Second Harmonic Magneto-Resistive Imaging to Authenticate and Recover Data from Magnetic Storage Media

Published

Author(s)

David P. Pappas, Alexey Nazarov, D Stevenson, Steven Voran, Mike E. Read, Erin M. Gormley, James Cash, Ken Marr, James Ryan

Abstract

A scanning magneto-resistive (MR) microscope was developed for high resolution imaging of magnetic tapes and digital media. Second harmonic detection was used to remove thermal anomalies. We were able to image sufficient lengths of tape for authentication purposes and for data recovery from damaged samples. The second harmonic technique provides high contrast magnetic images of the magnetic storage media using high resolution MR sensors from commercial hard disk drives. These images can be directly converted into the originally recorded analog audio waveforms or digital data.
Citation
Journal of Electronic Imaging
Issue
14

Keywords

data recovery, forensics, magnetic recording, Magneto-resistive imaging

Citation

, D. , Nazarov, A. , Stevenson, D. , Voran, S. , Read, M. , Gormley, E. , Cash, J. , Marr, K. and Ryan, J. (2005), Second Harmonic Magneto-Resistive Imaging to Authenticate and Recover Data from Magnetic Storage Media, Journal of Electronic Imaging, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31306 (Accessed April 25, 2024)
Created February 28, 2005, Updated June 24, 2021