When was bip39 introduced https://www.slideserve.com/lewarthbfp/getting-a-bip39-phrase-in-python-a-comprehensive-tutorial As you can see, these are regular words which can be easy to retail store or bear in mind. It is far from recommended to keep in mind them, but it is significantly easier than remembering a 64-character-long string of random quantities and letters. BIP39 https://listfav.com/story21680651/bip39-typescript-bip39-converter-an-overview-https-cutt-ly-uryc5rw7