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100 sats \ 5 replies \ @Krv 20 Feb freebie \ on: How to manually calculate the word 12 in a seed? bitcoin
You must do it with a computing device because it requires a hashing algorith.
A 12 word seed is storing 12 11-bit (0 or 1) sequences. The first 128 bits are randomly generated. The last 4 are the checksum generated by a hash of the 128 bits. Each 11 bit sequence corresponds to a single word in the wordlist.
You can take a hardware wallet and attempt to restore the seed, trying the last word over and over again until it renders a valid seed.
You may also use this tool: https://iancoleman.io/bip39/
Though, it could take many tries.
Note: This could be very insecure if you didn't generate the randomness using a secure method. Humans are very bad àt randomness.
Can i do the opposite? Put the private key and then i get the words?
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If you are talking about the random bits, or entropy, you can use the bip39 tool above to get the words.
If you are talking about the xprv, yprv, or zprv that results from the mnemonic phrase, that is not possible. The entropy stored in mnemonic pharse is put through a hashing algorithm to generate the private key. It is one way only. (https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki#from-mnemonic-to-seed)
Similarily, for any of the private keys of the addresses generated by the seeds, there's no way to get the seed from any of them.
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Thanks
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