The YubiKey-Guide by drduh is a community-maintained, in-depth tutorial and reference on how to use a YubiKey (hardware authentication token) with GPG, SSH, and related cryptographic setups. It explains how to generate, manage, and use keys, configure pin / touch policies, and integrate the YubiKey into secure workflows. Configuration instructions for requiring touch for operations. Step-by-step instructions for generating GPG keys and migrating them to a YubiKey. Troubleshooting and advice...