Walnut Digital Signature Algorithm by Veridify Security is a fast, low-energy, quantum-resistant digital signature algorithm that allows one party to generate a message verifiable by another party. It enables a signer with a private/public key pair to create a digital signature for a message, which can be validated by anyone with the signer's public key and the WalnutDSA verification protocol. WalnutDSA is designed to deliver significant performance improvements compared to ECDSA, making it suitable for various 8-, 16-, and 32-bit microcontrollers. It integrates with existing asymmetric and symmetric methods and is available for both software and hardware implementations. WalnutDSA is optimized for cost, power, and size, making it ideal for low-resource environments such as IoT devices.