Random wrinkle based PUF (IMAGE)
Caption
a, An illustration of liquid crystal polymer-based random wrinkles observed using a microscope and converted into a binary code, random and unique, and used as a PUF. Liquid crystals have different light transmittance depending on the direction of the molecules between the cross-polarizers.
b, The schematic of a PUF cube formed by stacking binary codes that change along the optical axis in one random wrinkle-PUF. A random binary cube is formed by utilizing this birefringence characteristic and stacking binary codes that vary depending on the optical axis.
c, Authentication process application using PUF cube. There are two applications for the authentication process using the PUF cube. "Polyhedron authentication" is used as a 3D password, like a jigsaw puzzle, by forming a polyhedron by setting random vertices inside the PUF cube. “Continuous authentication” is a method of sequential authentication by converting the faces constituting the formed polyhedron into 1D codes.
Credit
by Kitae Kim, Moon-Young Choi, Mohsin Hassan Saeed, Se-Um Kim, Youngmin Kim, and Jun-Hee Na
Usage Restrictions
Credit must be given to the creator.
License
CC BY