3 ms·
Not quite. A sha256 preimage attack would possibly let one mine blocks more quickly, but would be significantly more difficult than a collision attack, which wo
by sciyoshi 9y ago
Not quite. A sha256 preimage attack would possibly let one mine blocks more quickly, but would be significantly more difficult than a collision attack, which won't help you in this case. On the other hand, finding private keys for a given account would require solving elliptic curve discrete logarithms, and only then for bitcoin addresses which have been used as inputs to transactions. (This is one reason why change addresses are a good idea).
- cbr 9y agoGenerating a private key for a given public key is computationally infeasible with current approaches: right now you'd just have to brute force it. But if someone finds a vulnerability they might be able to cut that time down to where it's commercially viable to get the private keys. At which point there's no way for anyone to prove they're the true owner of an address.