| Affiliation: | 1. Department of Electronic Engineering Gachon University, 1342 Seongnam-daero, Seongnam, 13120 Republic of Korea;2. Department of Energy Engineering Convergence & School of Materials Science and Engineering, Kumoh National Institute of Technology, 61 Daehakro, Gumi, 39177 Republic of Korea;3. School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566 Republic of Korea
School of Electronics and Electrical Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566 Republic of Korea;4. Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), 12, Jeongiui-gil, Seongsan-gu, Changwon, 51543 Republic of Korea |
| Abstract: | In this study, a new concept of physical unclonable functions (PUFs) is introduced comprising reduced graphene oxide (GO) materials. To create a disordered conductivity distribution, two types of GO are used: HGO, are produced by the conventional Hummers’ method, and PGO, produced by Brodie's method with an additional unique purification procedure. It is found that PGO becomes graphene-like after room-temperature chemical reduction. These two reduced GOs have a distinct conductivity difference of up to 104 times. By blending these two materials, a random mixture is created that can generate a highly unpredictable electrical signal, serving as an ideal security key with strong randomness and uniqueness. The optimized PUF device, based on this approach, demonstrates excellent performance in generating secure keys. |
