Learn how to implement key authentication for PuTTY and WinSCP in this comprehensive 37-minute tutorial. Discover the benefits of using SSH keys for enhanced security and explore the edb25519 algorithm as a modern alternative to RSA. Create public and private edb25519 keys using puttygen and authorize them for login on a Linux server running Ubuntu 20.04. Configure PuTTY to utilize private SSH keys for authentication and disable password authentication on Ubuntu servers to enforce key-based access. Import and convert OpenSSH private keys to PPK format for cross-platform compatibility. Set up WinSCP to authenticate using private SSH keys. Gain practical knowledge on secure remote access techniques, including key generation, server configuration, and client-side setup for both PuTTY and WinSCP.