The Walnut Digital Signature Algorithm (WalnutDSA) is an innovative, quantum-resistant public key authentication solution tailored for the Internet of Things (IoT). It stands out for its fast performance, offering authentication speeds that exceed traditional methods like ECDSA by significant margins. WalnutDSA is compatible with a variety of platforms, including resource-constrained environments like FPGAs, ASICs, and popular microcontroller architectures such as ARM Cortex-M and RISC-V.