You are probaly referring to https://www.yubico.com/
I just bought one the other day for personal use, pretty cheap, cant say more becuase I have yet to receive it, but I have high hopes.
I just bought one the other day for personal use, pretty cheap, cant say more becuase I have yet to receive it, but I have high hopes.
For at least 2 linux boxes I use, I needed to add udev rules for the yubikey. That wasn't immediately obvious and took a few minutes to figure out why it wasn't working.