Presentation Information
[8p-N201-9]Ag/Ag2S Nano particles device based lightweight cryptographic system toward IoT edge security
〇Hiroki Tabata1, Oradee Srikimkaew2, Yuki Usami1,3, Shunsuke Araki4, Hirofumi Tanaka1,3 (1.LSSE Kyushu Inst. Technol., 2.School of Sci. Walailak Univ., 3.Neumorph Center, Kyushu Inst. Technol., 4.FCSE, Kyushu Inst. Technol.)
Keywords:
nanoparticle,IoT,cryptography
This study presents a lightweight cryptographic system using Ag nanoparticle devices to enhance data security in IoT edge environments with limited computational and power resources. Leveraging the nonlinear voltage response and charge retention of these nanomaterials, analog heart rate signals were encrypted through direct voltage input and decrypted using mathematical models based on device-specific input-output behavior. The encrypted output showed statistical randomness, passing 9 of 15 NIST SP 800-22 tests, with high p-values for block frequency, discrete Fourier transform, and linear complexity, indicating uniformity, independence, and unpredictability. The decryption process, using reverse nonlinear transformations, reconstructed the original signal with a mean square error of 0.13. Notably, encryption is achieved entirely through the physical properties of the material, requiring no digital computation. These results demonstrate the potential of in-materio encryption as a practical, low-power, hardware-based security solution for medical and other IoT edge applications.