Today I’m reading about how to save a copy of your secret keys outside a computer, using analog media, or sharing it by voice. For instance, for TOTP authenticators.

I found BIP39 coming from the crypto-wallets world:
https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

The user has to write down this passphrase

fragile mimic expect ketchup truth between thunder visit expose output powder derive process disagree razor
Which is carefully designed to be checksummed and it’s easy to say on a call

Finally deriving it into a set of bytes like

da39a3ee5e6b4b0d3255bfef95601890afd80709

Do you know some alternatives not related to cryptocurrencies? 🤔