Optical forensics for tracing counterfeit recorded media

Patrick J. Smith; Phelim O'Doherty; Carlos Luna; Sean McCarthy

doi:10.1117/12.578085

16 December 2004 Optical forensics for tracing counterfeit recorded media

Patrick J. Smith, Phelim O'Doherty, Carlos Luna, Sean McCarthy

Proceedings Volume 5616, Optics and Photonics for Counterterrorism and Crime Fighting; (2004) https://doi.org/10.1117/12.578085
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

We describe an optical forensic method for tracing a CD back to the pressing machine in which it was created, and present a system we have developed which maintains a library of the 'fingerprints' of such machines and can compare sample CDs against this library. In principle, any security feature that is deliberately created can be copied by a counterfeiter. In our forensic method we concentrate on features that arise spontaneously in the manufacturing process. Such features act as a signature or 'fingerprint'. In the case of CDs we show how the moulding process leaves an imprint of an unpolished part of the 'mirror plate' on the CD surface. Using machine vision and pattern-matching, we demonstrate the use of the system to acquire a positive match of a sample against a pre-recorded library entry created using a different CD from the same mould.

Citation Download Citation

Patrick J. Smith, Phelim O'Doherty, Carlos Luna, and Sean McCarthy "Optical forensics for tracing counterfeit recorded media", Proc. SPIE 5616, Optics and Photonics for Counterterrorism and Crime Fighting, (16 December 2004); https://doi.org/10.1117/12.578085

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