Fig. 3: Active information encryption with the required images.
From: Dynamically actuated soft heliconical architecture via frequency of electric fields
a Schematic diagram of active information encryption by setting one of a series of electric fields with different strengths and frequencies corresponding to a certain reflection color image as the encryption key of an information. b Images with a certain reflection color were obtained through a series of electric fields. c The images with a three-dimensional visual effect are shown with a slightly oblique viewing angle. The scale bar represents 5 mm.
