Laser surface authentication - reading Nature's own security code
A laser-based security technique called Laser Surface Authentication (LSA) is described in which diffuse laser scattering is used as a probe of the naturally-occurring randomness present in virtually all surfaces. LSA brings the principles of biometric identification currently used in human fingerprint- or iris-recognition to the world of inanimate objects such as paper documents, plastic cards, high value branded products and a range of other things that are commonly counterfeited or smuggled.
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Document Type: Research Article
Affiliations: Blackett Physics Laboratory, Imperial College London, London, UK
Publication date: 2008-09-01