$2 USB crypto token for use with GPG and SSH | danman's blog
GitHub - ronaldvdmeer/yubikey-openpgp-macos-catalina: This tutorial describes how to set up your Yubikey with macOS Catalina, generate the keys securely and make it work with your SSH client.
File:Gemalto usb shell token with a punched OpenPGP card inside.jpg - Wikimedia Commons
YubiKey 5C Nano - USB-C, key / token with multifactor authentication, OpenPGP and Smart Card (2FA) support # STATIC_TITLE # | eD system a.s.
YubiKey 5 NFC - USB-A, klíč/token s vícefaktorovou autentizaci (NFC, MIFARE), podpora OpenPGP a Smart Card (2FA) - NETRA
Introduction to OpenPGP: Decrypt this Message
GnukでOpenPGP card互換のUSBトークンを作ってみた - Gマイナー志向
TurtleAuth: Let's Make a DIY GPG USB Key - Hackster.io
TermBot | Hardware Security SDK
OpenPGP card - Wikiwand
Crypto-stick (OpenPGP USB stick) — insecure.ws
GitHub - solokeys/openpgp: OpenPGP functionality for Solo
Anleitung: Überprüfung der OpenPGP-Version - Powered by Kayako Help Desk Software
TurtleAuth: Let's Make a DIY GPG USB Key - Hackster.io