Patent ID: 7677438
Filing Date: 2010-03-16
Classification: G06K,G06Q,G07D,H04L

Abstract:
1. A method, comprising: embedding a scattering agent in a fixative, wherein the embedded scattering agent is fixed in a unique 3-dimensional physical arrangement that reflects, refracts, scatters, reradiates, and induces radio frequency energy; attaching the scattering agent to a physical object; reading the embedded scattering agent, wherein the reading includes: exposing the scattering agent to radio frequency energy, receiving reflected and refracted radio frequency energy from the scattering agent, and deriving a digital fingerprint of the unique physical arrangement from the reflected and refracted radio frequency energy; combining the digital fingerprint with information associated with the physical object; and using the digital fingerprint to authenticate the information associated with the physical object.