Shamir Secret Sharing
umm so he had the master key printed out as backup anyway so there was never really any danger if i read correctly. clickbait?<p>> Ha. I forgot all about it, but in a bout of “what if it doesn’t work” paranoia, I printed out the base64-encoded master key when we had generated it the night before, stuffed it into an envelope, and gave it to John for safekeeping.