Getting started with security keys

YubiKey Guide

Community guide to using YubiKey for GnuPG and SSH - protect secrets with hardware crypto.

OpenSK

OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.

Webauthn and security keys

Describe how authentication works with security keys, details the protocols, and how they articulates with WebAuthn. Key takeaway: “There is no way to create a U2F key with webauthn however. (…) So complete the transition to webauthn of your login process first, then transition registration.”