Just so it's clear, the previous Yubikey NEO also supports gpg-agent for SSH authentication, not just the new Yubikey 4. I've been using one for months. It pres

Just so it's clear, the previous Yubikey NEO also supports gpg-agent for SSH authentication, not just the new Yubikey 4. I've been using one for months. It presents a standard smarcard CCID interface and runs an OpenPGP applet. The source to the actual Javacard applet that implements is available on Github: https://github.com/Yubico/ykneo-openpgp https://github.com/Yubico/ykneo-openpgp