This - obviously - should be a last resort
not sure if this is the right place for this post
but I was wondering whats the best possible way to store a physical copy - if you had to - of your asymmetric keys.
One way that i found someone is doing is using QR code BUT a QR code for lets say ssh key is big , and bigger means its more error prone, so i am sure that there are some other way to represent text in an "encoded graph" that will be easy to scan and retrieve .
banks nowadays use phototan for secure transactions by encrypting codes into ...
photoTan
what are your suggestions people ?
@wendell