Tax Stamps2019-03-13T13:22:33+00:00

Tax Stamps are stamps used to collect taxes and fees. They are usually issued by national or local Governments. The high value of Tax Stamps justifies that they contain security features to prevent counterfeiting.

Prooftag offers a complete item level tracking system, with secured stamps and authentication devices.



Stamp Flow

Data Flow


Prooftag Readers

Formal authentication is ensured by Prooftag readers (M-Proof, S-Proof). Those readers can be used for online and offline authentication and provide a secured access to the central database system. Those readers can be used to validate the authenticity of chaosmetric pattern as well as over and covert features.


Production of secured stamps

Chaosmetric Concept

Conventional security technologies are mass-produced and consequently mass-reproducible. Only technologies that cannot be reproduced, even by their own manufacturer, guarantee efficient protection against counterfeiting. Since 2004, Prooftag has developed its own security solutions based on a chaosmetric concept. Like biometrics, that refers to the identification of humans by their characteristics or traits, chaosmetric relies on the recording of physically unclonable features to create a serialized authentication element.

Chaos theory studies the behavior of dynamical systems that are highly sensitive to initial conditions. Small differences of these initial conditions yield widely divergent outcomes for such dynamical systems, rendering long-term prediction impossible. Chaotic behavior can be observed in many natural systems. In those systems human intervention impact the outcome but cannot force a determined result. Once stabilized, the result of certain chaotic systems can be observed and measured. The measurement of each element gives a unique result different from all other samples.
Bubble Tag™
Codes 2D


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