Home Glossary Invisible Constant Information Invisible Constant Information By - 25/01/2018 110 Hidden data that remains constant, for example a country name, a document type or an image. This data can be made visible with the aid of a decoding lens. + posts Windowed Asymetric print Aurora Barcode watermark RELATED ARTICLESMORE FROM AUTHOR Glossary Invisible Personal Information (IPI) Glossary 3D Photo Glossary Invisible Personal Information (IPI) Glossary Hotfoil Glossary Varifeye Glossary Watermark Related Content Designing identity documents Nick Nugent - 01/10/2015 0 Identities in the blockchain Peter Hoogendoorn - 08/10/2018 0 Designing better banknotes Dr Andrea Firth - 01/10/2011 0 The golden harmony of Fibonacci Anton Bleikolm - 01/02/2012 0 Does money make you ill? Marcus Riemann - 01/10/2014 0 Load more