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1/2 images Important data, such as a Bitcoin wallet address, can be stored and concealed quite easily in ordinary plastic using 3D printers and terahertz radiation, scientists at TU Wien show. There are many ways to store data - digitally, on a hard disk, or using analogue storage technology, for example as a hologram. In most cases, it is technically quite complicated to create a hologram: High-precision laser technology is normally used for this. However, if the aim is simply to store data in a physical object, then holography can be done quite easily, as has now been demonstrated at TU Wien: A 3D printer can be used to produce a panel from normal plastic in which a QR code can be stored, for example. The message is read using terahertz rays - electromagnetic radiation that is invisible to the human eye. The hologram as a data storage device. A hologram is completely different from an ordinary image.
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