I have two Yubikeys, each with a separate SSH key that's been generated/signed by an offline master that resides on a USB key in a safe. In the event I lose one, I simply revoke/expire the key on keyservers and generate another using the offline key.
If you don't have your Yubikey at your parents house, maybe you should just enjoy spending time with them, instead of working on things that need an SSH key?
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I have two Yubikeys, each with a separate SSH key that's been generated/signed by an offline master that resides on a USB key in a safe. In the event I lose one, I simply revoke/expire the key on keyservers and generate another using the offline key.
If you don't have your Yubikey at your parents house, maybe you should just enjoy spending time with them, instead of working on things that need an SSH key?