Brainwallets are like the mnemonic seeds generated by hardware wallets, only the human user generates the words themselves and memorise them without any written record.

The mnemonic seed/ passphrase is never written down. It is ‘stored’ in the holder’s brain.

If the holder forgets the passphrase (or becomes incapacitated), the money is likely lost forever – not a very secure storage method.

Creating randomness in passphrase words is extremely difficult to do by hand, therefore security is again compromised.

It is possible to use a [BIP 39] passphrase generator to get strong entropy/ randomness and optionally add a salt value to this for additional security, however storing anything in the human brain carries inherent risks.

Use a brainwallet at your own (high) risk.

For a detailed tutorial on complex brainwallet creation, see this article by Dr Craig Wright.

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Written by Ramon Quesada

Passionate about Blockchain & Bitcoin technology since 2013, Co- Founder of, Team Manager in the CoinTelegraph Spain franchise (2016-2017 years) Co. Organizer of the Blockchain Boot camp Valencia 2018, Co. Organizer of the mini Hackathon BitcoinSV Barcelona, in August 2019, current coordinator of the BSV Valencia Meetup.


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