Tailored Raspberry Pi 3B+ Software for the Implementation of Hardware Security Primitives Based on Commercial Off-the-Shelf Devices

The Raspberry Pi 3B+ is a well-known single-board computer that can be used to implement and test a number of hardware security primitives suitable for Commercial Off-The-Shelf (COTS) devices. However, the software that implements and tests these primitives is rarely made fully available as open-source code. In this work, we present and discuss open-source software for the Raspberry Pi that enables cryptographic applications using COTS hardware. In particular, we discuss the software utilised for the implementation of a Physical Unclonable Function (PUF) based on the retention characteristics of the Dynamic Random Access Memory (DRAM) of a Raspberry Pi 3B+, as well as a kernel for the same board that allows for the implementation of a True Random Number Generator (TRNG) based on a COTS Resistive Random Access Memory (ReRAM) module.