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I downloaded my blockchain wallet but now i forget the password and my recovery phrase is 16 word, so I tried them but they are not working. Can somebody please help me?

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BIP 39 backup seed words always come in triplets, e.g., 3, 6, 9, 12, 15, 18, 21, 24... Most wallets support 12, 18 or 24 words. The only thing that makes sense is that you might have a HD wallet that is using 15 seed words and an additional passphrase that was of you choosing, BIP 39 salt. Check to see if the first or last word in your list is not in the list of BIP 39 words documented here. If this is the case, this word might be acting a a passphrase, the BIP 39 salt.

Otherwise, you are almost SOL. If this is the case, you probably have substantial work ahead of you to figure the two missing BIP 39 seed words and their correct positions.

The morale of the the story is haste makes waste when writing down BIP 39 seed words.

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You had to chose a password and write down the seed to make it secure. You can't access your wallet without password or seed. Otherwise, someone could easily steal the coins. So your only possibilities are

(1) remembering the password.

(2) You said that your seed (16 words) did not work. Maybe you wrote them down incorrectly. If your wallet supports the default BIP-0039, you could look up the words and check them here: https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt Maybe you wrote "odd" instead of "add" or smth. like this down.

  • If it's a BIP39 recovery seed, it's 12, 15, 18, 21, or 24 words long. – brec Jan 15 '18 at 20:39
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Blockchain.info uses either 17 or 12 recovery words. Looks like you are missing a word. You can use seedrecover.py to try to get your missing word back.

  • can I still use the suggestion you gave on encrypted blockchain wallet. I downloaded it since – Awwal Kako Jan 17 '18 at 3:47
  • No. You can either try to brute force the encrypted wallet or recover the missing words. – David Veksler Jan 29 '18 at 2:06
  • So, this script can be configured or changed to brute-force then? - I suppose I am right that the process may take a while? – Willtech Jan 30 '18 at 8:40
  • Yes. If you only have the last word missing, it should not take more than a second to find the missing word. – David Veksler Feb 5 '18 at 13:09

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