You have 2 physical Yubikeys and no backup anywhere else. One way to achieve it is by generating it on a RAM disk and throwing it away, once it's on both Yubik

You have 2 physical Yubikeys and no backup anywhere else. One way to achieve it is by generating it on a RAM disk and throwing it away, once it's on both Yubikeys. I blogged about it here https://blog.snapdragon.cc/2019/04/27/using-a-yubikey-to-secure-ssh-on-macos/ https://blog.snapdragon.cc/2019/04/27/using-a-yubikey-to-sec... (for macOS)