Re: Bitcoin puzzle transaction ~32 BTC prize to who solves it
I solved puzzle #66 but I'm very afraid to sweep it. Since no one claimed it yet, they definitely belong to me, right? Here's my proof: the encrypted private key is:
If anyone steals my prize I will divulge the decryption key.
Or, simply hash it once together with some secret value, you only need to prove you knew the hashed value before anyone else, not to protect the actual data.
Code:
0x4074a46512e55c9559cb8af86c983bc424d9f2d5fbb3c14b65b1045d21972d219b359a24806826a94c72e9a95ca00dab
First 16 bytes are the IV, then 32 bytes of private key. I removed the padding, since it's 16 bytes of 0x10 (e.g. no bytes in last block).If anyone steals my prize I will divulge the decryption key.
Or, simply hash it once together with some secret value, you only need to prove you knew the hashed value before anyone else, not to protect the actual data.
Code:
SHA256(privateKey + "some secret value")
Provide decryption keys, you sayd that you solved 66.
I suggest that everyone who said that they decided to 66 should be banned, there were quite a few of them.
It's funny that you didn't see anything wrong there 
I missed the part that we also need 16 bytes for the encrypted padding block, or else we can put whatever we want in it.
And the other problem is that you don't even need some powerful GPU to solve the 66 priv key once pub is known. Most of the work can be done in advance.
I missed the part that we also need 16 bytes for the encrypted padding block, or else we can put whatever we want in it.And the other problem is that you don't even need some powerful GPU to solve the 66 priv key once pub is known. Most of the work can be done in advance.