A Path to the Next Generation of U.S. Banknotes Keeping Them Real (2007) / Chapter Skim
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5 Disruptive Feature Platforms
5 Disruptive Feature Platforms
Pages 87-96
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From page 87... ...
Also, most if not virtually all of the banknote anticounterfeiting features have been optical. The nature of emerging threats and the even more capable digital technologies that are becoming available to the counterfeiter suggest that this basic approach to counterfeit deterrence will likely not continue to provide a path to secure currency indefinitely into the future.
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From page 88... ...
• Simulation Strategies -- A discussion of potential ways in which a counterfeiter could simulate or duplicate the feature, and the expected degree of difficulty in attempting to do so. • Key Development Risks and Issues: Phase I -- A discussion of the durability challenges, feature aesthetics, anticipated social acceptability, and description of the key technical challenges that must be addressed during the first phase of the development process to demonstrate the feasibility of the feature idea: that is, demonstrate feature capabilities and determine the usefulness in counterfeit deterrence.
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From page 89... ...
In this regard, these feature platforms are disruptive in nature and could be characterized as "game changing" with respect to counterfeit deterrence. They will demand that prospec tive counterfeiters greatly increase their expertise and investment far beyond that required to replicate optical images.
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From page 90... ...
The committee suggests two feature platforms that will modify the substrate to significantly improve counterfeit deterrence. One route is to engineer the cotton fiber, or dope the cotton fibers, to impart special properties that would be proprietary to U.S.
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From page 91... ...
If they did, they still could not duplicate the exact fiber structure in authentic currency substrate materials. Engineered Cotton Fibers The cotton fiber is a complex biological structure engineered by both natural selection and intensive human plant breeding.
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From page 92... ...
• Memory polymers: A simple case would involve reversible surface "stippling" that would manifest as a change in roughness that could be detected quali tatively by touch and quantified by instrumentation. NiTi Shape Memory and Superelastic Responsive Materials Shape memory materials, most commonly based on the intermetallic alloy NiTi, offer various phenomena that can produce active responses which would be useful for developing human-perceptible features.
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From page 93... ...
d i s rU P t i v e f e at U r e P l at f o r m s exploitable phenomenon is transformation superelasticity, in which structures can be deformed owing to large strains but recover shape when the stress is released. These structures could be wires or thin-foil-based patterns (dots, eagles, numbers, buildings, and so on)
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From page 94... ...
When this type of feature is integrated in a security strip in a banknote paper substrate or, ultimately, when a passive e-substrate is employed as the currency substrate itself, it can pro vide excellent security. In the second and much more technically challenging type of e-substrate feature, the active e-substrate feature, the patterns that compose the feature are active devices that can respond to a cash handler or a machine reader.
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From page 95... ...
Smart materials and substrates can be used to develop features that require advanced printing methods or other physical processes to create the currency substrate. The e-substrate feature platform and the anomalous currency space are essentially a collection of technologies that can be assembled to produce the desired security capability.
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From page 96... ...
A number of these features could be used by the blind through the improved tactile response of banknote currency. For example, the piezoelectric effect used to modify the surface profile of the currency can be used to create surface "bumps" or patterns through some external power source.
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