Robustness of organic physically unclonable function with buskeeper circuit for flexible security devices

Abstract

Flexible devices have been studied to realize IoT or novel wearable devices. Data the flexible devices deal with can include personal information when application area expands more. A security system for flexible devices becomes more important in this case. In this study, we investigated thermal stability of an organic flexible security system. The security utilizes fabrication variation of a chip, and it is called physically unclonable function (PUF). As a result, bit error rate of an organic PUF was 1.8% and index of ID uniqueness (i.e., randomness) was almost theoretical value of 0.48. Generated ID remains even after annealing at 100°C for 97 hours by using CYTOP encapsulation. XRD measurement implies that a degradation of PUF characteristic partially derives from structure change of organic n-type semiconductor thin-film after annealing.

Low voltage operation of organic thin-film transistor with atmospheric coating of high-k polymer dielectric

“…Organic electronics are expected to have various applications. [1][2][3] An advantage of organic electronics is that they can be manufactured continuously at RT and atmospheric pressure. Concerning electrode and semiconductor materials, sufficient research has been conducted on inkjet printers 4,5) and gravure printing.…”