The biggest advantage of a brain wallet is that all the information needed to redeem your money is in your brain (arguably, that is the only advantage of a brain wallet).

The biggest disadvantage of a brain wallet is that people tend to forget passphrases (if your passphrase has even slightly reasonable entropy, it is much more likely to be forgotten than brute-forced).

So your method does not enjoy the main advantage of brain wallets, but it does suffer from the main disadvantage. Clever.


You should pick one option: Either make a very strong brain wallet (using some clever key stretching, like warpwallet) and try really hard not to forget it, or make a split paper wallet and store the pieces in several places. That way you at least gain one of the advantages.


Oh and by the way - how is your method any different from storing a BIP38-encrypted private key?