Quote from: f3tus on August 11, 2021, 01:27:56 PM

Quote from: ETFbitcoin on August 11, 2021, 11:43:03 AM

Why don't you just use BIP 39 passphrase, then save the seed words on crypto.txt without the passphrase itself?

Most wallets do not offer that possibility, they generate a 12, 15, 24 word wallet for you. Of course using TREZOR/Ledger with a passphrase is safer, but you could even use that AND date-shift encrypt it for EXTRA security.

I agree that there aren't many wallet which let you add BIP 39 passphrase during word seed generation. But when it's available, it's easy to use it.

Quote from: f3tus on August 11, 2021, 07:33:01 PM

Anyway, here's the write-up from the guy who cracked it and his code:

https://www.reddit.com/r/CryptoCurrency/comments/p2jkh3/how_i_solved_utoshiromiballzas_puzzle_in_just/
https://github.com/willhblackburn/brute-force-seedshift-puzzle-pub

IMO 7 days is quite short since he use free (?) API and single-thread software.