Post
Topic
Board Bitcoin Discussion
Merits 1 from 1 user
Re: == Bitcoin challenge transaction: ~1000 BTC total bounty to solvers! ==UPDATED==
by
garlonicon
on 16/09/2024, 10:08:16 UTC
⭐ Merited by vapourminer (1)
Yes, I know it is zpub. I know it uses BIP84 key derivation for P2PKH addresses. I know it contains 024ee2be2d4e9f92d2f5a4a03058617dc45befe22938feed5b7a6b7282dd74cbdd public key, double SHA-256 checksum, equal to 0xb968b15d, and some other information, which you can see in hex. However, the chain code, and some other information is still missing.

And also, even if you can figure it out, then you probably won't derive the key from the puzzle, but the "non-truncated key" instead. Which means, that you will get hard, 256-bit keys, where only some N bits would match the puzzle. But there could still be enough non-zero bits, to make breaking it quite hard, if you try this method.

And also note, that by breaking this single key, you could reach extended private key, and then access the whole wallet.