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Optical identifier comprising randomly oriented partial faces

A technology of optical recognition and recognizer, applied in the field of optical recognizer, can solve problems such as high melting point and complex process

Inactive Publication Date: 2007-11-28
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with glass PUFs is that the particles that must be embedded in the glass must have a higher melting point than the glass
A known solution to this is to place air bubbles in the glass, which is a rather complicated process

Method used

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  • Optical identifier comprising randomly oriented partial faces
  • Optical identifier comprising randomly oriented partial faces
  • Optical identifier comprising randomly oriented partial faces

Examples

Experimental program
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Embodiment Construction

[0034] FIG. 1 shows a schematic cross-sectional view of a first embodiment of a non-clonable optical identifier 10 according to the invention being illuminated by a radiation beam 12 . The identifier 10 comprises a carrier layer 14 which has a scattering surface 16 comprising a plurality of randomly oriented partial surfaces. The carrier layer 14 is at least partially transparent to the radiation. A preferred material for the carrier layer 14 and the carrier layers described below is glass, but other at least partially transparent materials are also suitable. The radiation beam 12 is generated by a radiation source 18 and directed to the scattering surface 16 . The scattering surface 16 , ie the plurality of partial surfaces, scatters the radiation beam 12 to generate a scattering portion 20 of the beam 12 comprising a plurality of partial beams 22 with randomly oriented directions. The scattering portion 20 passes through the carrier layer 14 and exits the identifier 10 . ...

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PUM

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Abstract

The invention relates to an optical identifier (30) for generating an identification signal in response to an incident radiation beam (12), and to a corresponding method. In order to provide an optical identifier (30) which can be produced by a simplified process and which has nevertheless a sufficient or even improved stability against environmental interferences it is proposed that said identifier comprises a carrier layer (32), at least partially transparent to said radiation beam (12), having a first scattering face (34) comprising a plurality of randomly oriented partial faces for scattering at least a part of said radiation beam (12), wherein said identification signal is formed by a scattered part of said radiation beam (12). Further, a device comprising said identifier, and a reading apparatus for identifying the identifier are proposed.

Description

technical field [0001] The invention relates to an optical identifier, in particular an unclonable optical identifier, generating an identification signal in response to an incident radiation beam; a device comprising said optical identifier; a reader for identifying said optical identifier and a method of generating an identification signal in response to a radiation beam. Background technique [0002] The use of "physically un-clonable functions" (PUFs) for security purposes is known eg from US 6,584,214. Incorporating a PUF into a device such as a smart card, chip or storage medium makes it extremely difficult to create "clones" of the device. "Clone" means a physical replica of a device or a model capable of predicting the input-output behavior of the device with sufficient reliability. Difficulties in physical replication arise because PUF fabrication is an uncontrolled process and PUFs are highly complex objects. Accurate modeling is extremely difficult because of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07D7/12
CPCG07D7/0013H04L9/3278G07D7/0032G06K7/08G06K19/00G07D7/12
Inventor W·奥菲P·T·图伊尔斯B·斯科里克A·H·M·阿克曼斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV