“I must, sadly, withdraw my endorsement of Yubikey 4 devices”
I've been looking into purchasing an OpenPGP card/stick for a while. Haven't yet pulled the plug.<p>Here are some fully open Yubikey alternatives.<p><a href="https://www.sigilance.com/" rel="nofollow">https://www.sigilance.com/</a><p><a href="https://www.nitrokey.com/" rel="nofollow">https://www.nitrokey.com/</a><p><a href="http://www.seeedstudio.com/wiki/FST-01" rel="nofollow">http://www.seeedstudio.com/wiki/FST-01</a>