Design and Analysis of Reconfigurable Cryptographic Primitives: TRNG and PUF

With the rapid growth of the Internet of Things technologies, individuals’ security and privacy concerns increase. There has been a leaky ecosystem webbed by the presence of sensors and devices around us. It has become a threat for the users and raises concerns for its widespread applicability. Many works have been proposed in a similar direction, building innovations for enhancing security. Meanwhile, Physical unclonable functions (PUFs) and Random Number Generators (RNGs) have proved to be the most useful for building security applications, especially in resource restraining devices. The security protocols, including identification, authentication, and key agreement, can be developed using PUFs, while RNGs can produce ephemeral keys and nonces. The true random number generator (TRNG) and PUF as a re-configurable circuit reduce the hardware cost and become favorable in the resource-constrained environment. This paper proposes a low-cost re-configurable TRNG–PUF, which can be used as both TRNG and PUF to harness their benefits. The proposed re-configurable TRNG–PUF is implemented on FPGA to verify the design. We evaluate the proposed scheme against various parameters and compare them with the existing designs, which proves our claim of better performance.