implementing-digital-signatures-with-ed25519

# Implementing Digital Signatures with Ed25519 ## Overview Ed25519 is a high-performance digital signature algorithm using the Edwards curve Curve25519. It provides 128-bit security with 64-byte signatures and 32-byte keys, offering significant advantages over RSA and ECDSA including deterministic signatures (no random nonce needed), resistance to side-channel attacks, and fast verification. This skill covers implementing Ed25519 for document signing, code signing, and API authentication. ## When to Use - When deploying or configuring implementing digital signatures with ed25519 capabilities in your environment - When establishing security controls aligned to compliance requirements - When building or improving security architecture for this domain - When conducting security assessments that require this implementation ## Prerequisites - Familiarity with cryptography concepts and tools - Access to a test or lab environment for safe execution - Python 3.8+ with required dependencies installed - Appropriate authorization for any testing activities ## Objectives - Generate Ed25519 key pairs for signing - Sign messages and files with Ed25519 - Verify signatures against public keys - Implement multi-signature verification - Build a simple code signing system - Compare Ed25519 performance with RSA and ECDSA ## Key Concepts ### Ed25519 vs RSA vs ECDSA | Property | Ed25519 | RSA-3072 | ECDSA P-256 | |----------|---------|----------|-------------| | Security | 128-bit | 12...