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Security by Design: False Split Fountains

Joel Zlotnick, Jordan Brough and Troy Eberhardt The first three papers in this series described how counterfeiters reverse engineer security document artwork and proposed security...

Transparent ink

Transparent ink that becomes visible/invisible, depending on the angle of view and/or light.

UV Ink

Ink that is invisible to the naked eye and that becomes visible when irradiated with Ultra Violet (UV) light. This can consist of text, a...

Spark

An optically variable ink that changes colour and brightness, giving the impression of dynamic movement.

Thermochomatic ink

Ink that changes colour in response to a source of heat or cold. Once the heat source has been removed, the colour change (shift)...

Phosphor ink

Ink that emits light following exposure to a light source (ambient or UV light).

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Uzbekistan issues upgraded 2,000- and 20,000-Sum banknotes

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On 14 June 2021, the Central Bank of Uzbekistan started issuing new, upgraded banknotes in denominations of 2,000 Sum and 20,000 Sum. The banknotes...

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Security ink discovered for fraud prevention

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Indian scientists have developed a special safety ink that can prevent counterfeiting of banknotes and identity documents. After exposure to UV light of a certain...

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