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Nowadays, Internet of Things (IoT) is a trending topic in the computingworld. Notably, IoT devices have strict design requirements and are oftenreferred to as constrained devices. Therefore, security techniques andprimitives that are lightweight are more suitable for such devices, e.g.,Static Random-Access Memory (SRAM) Physical Unclonable Functions (PUFs) andElliptic Curve Cryptography (ECC). SRAM PUF is an intrinsic security primitivethat is seeing widespread adoption in the IoT segment. ECC is a public-keyalgorithm technique that has been gaining popularity among constrained IoTdevices. The popularity is due to using significantly smaller operands whencompared to other public-key techniques such as RSA (Rivest Shamir Adleman).This paper shows the design, development, and evaluation of anapplication-specific secure communication architecture based on SRAM PUFtechnology and ECC for constrained IoT devices. More specifically, itintroduces an Elliptic Curve Diffie-Hellman (ECDH) public-key basedcryptographic protocol that utilizes PUF-derived keys as the root-of-trust forsilicon authentication. Also, it proposes a design of a modular hardwarearchitecture that supports the protocol. Finally, to analyze the practicalityas well as the feasibility of the proposed protocol, we demonstrate thesolution by prototyping and verifying a protocol variant on the commercialXilinx Zynq-7000 APSoC device.

Public-Key Based Authentication Architecture for IoT Devices Using PUF