Method for unambiguous marking of an object
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United States of America Patent
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Jan 17, 2017
Grant Date -
Jul 2, 2015
app pub date -
Jun 18, 2013
filing date -
Jun 18, 2012
priority date (Note) -
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Abstract
The invention relates to a method or system for unambiguous marking of an object (1), wherein unique features (3) are digitized and signed with a private key (9) and the unique features (3) themselves, in addition to the signature (8) of the digitized features (6), are arranged on the object (1) or a packaging (2) of the object (1), or are formed by at least a part of the object (1) or the packaging (2) thereof, and the authenticity of the object (1) is determined by comparison of the unique features (3) with the decrypted signature (8) of the digitized features (6), which signature is arranged on the object (1) or the packaging (2) thereof and decrypted with a public key (11). To create a secure method that can be implemented simply and cost-effectively, the unique features (3) are formed by optically detectable three-dimensional structures or materials with optical properties that differ depending on the viewing angle (15), and the digitized features (6) are generated by means of an algorithm (17) which is applied to at least two digital images (16, 16′) of the unique features (3) recorded with at least one digital camera (5).
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