Abstract
Resonant-Tunnelling Diodes (RTDs) have been proposed as building blocks for Physical Unclonable Functions (PUFs). In this paper we show how the unique RTD current-voltage (I-V) spectrum can be translated into a robust digital representation. We analyse 130 devices and show that RTDs are a viable PUF building block.
Highlights
Physical Unclonable Functions (PUFs) provide an alternative method to generate a secret
The Resonant-Tunnelling Diodes (RTDs) encapsulates a quantum nanostructure between two electrical contacts and displays an exotic I-V characteristic not seen in classical devices
The I-V spectrum exhibits a peak which is highly dependent on the quantum confinement within its nanostructure, and the quantum confinement depends on the overall atomic arrangement of the device
Summary
Physical Unclonable Functions (PUFs) provide an alternative method to generate a secret. Instead of storing the secret in digital memory or asking a user to provide it, it is derived from a physical characteristic. The I-V spectrum exhibits a peak which is highly dependent on the quantum confinement within its nanostructure, and the quantum confinement depends on the overall atomic arrangement of the device. The atomic arrangement is subject to random process variations during manufacture. Each manufactured device exhibits a spectrum with a uniquely positioned peak. The peak location can be translated into unique device specific data. To securely authenticate the device PUFs are proposed [8]. A PUF is a device that uses the physical characteristics of an IC to generate a secret. The response is dependant on the physical characteristic of the IC and the challenge c
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