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Author Topic: Missing last word of the recovery phrase  (Read 316 times)
Jaemes (OP)
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June 06, 2017, 01:27:33 AM
 #1

A few years ago, i wrote down my 12 word recovery mnemonic for my blockchain bitcoin account. Due to idiocy, I now only have 11 words out of this phrase (missing the last one).

I've had a look at previous posts and cant seem to find anything, so I was wondering if anyone knew of a script or program that could automatically go through every possible word in a dictionary based attack or something similar.

Thanks!
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petahasher
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June 06, 2017, 01:33:13 AM
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That actually sucks! I'm sure it wouldn't be too hard to find the last word, there are only so many words in the English dictionary to try out, and it has to be one of them. I'm probably at the same level as you on this one, so I don't have any ideas. I don't know of any scripts that could do this either, but I'm sure someone can make one for you!
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June 06, 2017, 02:49:14 AM
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IIRC blockchain.info's wallet uses BIP39 for the seed, so if you are absolutely sure that you are missing specifically the 12th word in the phrase (position matters, and knowing the absolute position means that it is much easier to brute force), then you can go through the BIP 39 wordlist and brute force your way in. There are only 2048 words used and they can be found here: https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt

Jaemes (OP)
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June 06, 2017, 06:05:44 AM
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That actually sucks! I'm sure it wouldn't be too hard to find the last word, there are only so many words in the English dictionary to try out, and it has to be one of them. I'm probably at the same level as you on this one, so I don't have any ideas. I don't know of any scripts that could do this either, but I'm sure someone can make one for you!

Haha i know right, i best get typing! Cheers anyway
Jaemes (OP)
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June 06, 2017, 06:15:50 AM
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IIRC blockchain.info's wallet uses BIP39 for the seed, so if you are absolutely sure that you are missing specifically the 12th word in the phrase (position matters, and knowing the absolute position means that it is much easier to brute force), then you can go through the BIP 39 wordlist and brute force your way in. There are only 2048 words used and they can be found here: https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt

That's great, thank you for this! Do you know if this wordlist would be the same for the 2013 wallet? As I know it was updated at one point
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