Figure 6
From: Physically unclonable functions taggant for universal steganographic prints
Example of hidden embedded information: (a) Rubber stamp with Amabie engraved. (b) Stamp ink comprising Au mud paint and nanobeacons. (c) Stamped Amabie. Inset: original figure. (d) Raman spectra of Amabie and background. We processed the Amabie portrait from a photograph courtesy of the Main Library of Kyoto University.
