Topic: Lets have some fun!! Brainwallet with 1btc. You crack it, its yours. FREE BTC - page 3. (Read 7974 times)
July 16, 2013, 02:09:51 PM
How long is the password?
July 16, 2013, 02:06:48 PM
It's not just that there are no numbers, but that it is upper case followed by all lower case like a person's name.
Yeah, roughly (24/58)^7 = 0.002 for an uppercase followed by any six lowercase, so its getting on for unlikely, but not wildly impossible.
As you all probably know more about this than me; what about with every second letter a vowel?
Eg 1Nakamo
not 1Stshnm
July 16, 2013, 02:03:50 PM
It's not just that there are no numbers, but that it is upper case followed by all lower case like a person's name.
Yeah, roughly (24/58)^7 = 0.002 for an uppercase followed by any six lowercase, so its getting on for unlikely, but not wildly impossible.
July 16, 2013, 01:57:20 PM
It would have to be one hell of a collision!
Scratch that. Math was never my best subject. Its (49/58)^7 = 0.3 so not so unlikely after all. OOPS
Not to nitpick but I believe the odds (after the address type) being a 1 are 1 in 256 (assuming ripemd160 distribution from sha256 hash is even) while the odds of 2-9 are 8/57 IF the first isn't isn't a 1.
so not so unlikely after all.
It's not just that there are no numbers, but that it is upper case followed by all lower case like a person's name.
July 16, 2013, 01:54:27 PM
Quote
x@x:~/vanitygen/vanitygen$ ./vanitygen 1NatimoL
Difficulty: 873388193410
[65.48 Kkey/s][total 190208][Prob 0.0%][50% in 107.0d]
Difficulty: 873388193410
[65.48 Kkey/s][total 190208][Prob 0.0%][50% in 107.0d]
multiplied by whatever attack, divided by how much better his PC is than mine..
If you know n and hash(n) [ie rainbow table], is it possible to compute z given hash(z) [ie vanitygen output], or even n1+n2+n3 -> hash(n1+n2+n3) ~> ?
July 16, 2013, 01:47:09 PM
It would have to be one hell of a collision!
Scratch that. Math was never my best subject. Its (49/58)^7 = 0.3 so not so unlikely after all. OOPS
Even a capital letter followed by 6 lowercase ones comes out to roughly one in 100 (I think I'm getting the hang of this now).
July 16, 2013, 01:24:54 PM
The private keys generated by brain wallet are sha256 hashes of a passphrase. I don't see how you could come up with a passphrase that would generate a 256 bit private key which in turn would generate a public address beginning with "1Natimo". The pass phrase would just look like random characters and have no meaning.
It would have to be one hell of a collision!
July 16, 2013, 01:23:04 PM
The 32-byte hex thing was me just trying to be funny because that's what a private key is.
That was not the OP.
I think from the public address it's obvious this is not a brain wallet.
That was not the OP.
I think from the public address it's obvious this is not a brain wallet.
Ah, sorry. There's a small chance this is real but I agree the public address is unlikely to have come from brain wallet.
July 16, 2013, 01:09:05 PM
The 32-byte hex thing was me just trying to be funny because that's what a private key is.
That was not the OP.
I think from the public address it's obvious this is not a brain wallet.
That was not the OP.
I think from the public address it's obvious this is not a brain wallet.
July 16, 2013, 12:28:02 PM
Not to belabor the point but you said...
then you also said...
Are you saying you typed in words but are giving clues to the sha256 resulting hash (i.e. what brain wallet calls the 'secret exponent') and not the passphrase itself?
If so, then your clues would give hints to each nibble/byte or some other sequence of the sha256 hex string, not the passphrase. (Can you clarify?)
So, for example, clue #3 may refer to 'DEAF'.
Quote
It's a 32-byte hexadecimal string.
then you also said...
Quote
As soon as I typed the last word in thats how the address looked...
Are you saying you typed in words but are giving clues to the sha256 resulting hash (i.e. what brain wallet calls the 'secret exponent') and not the passphrase itself?
If so, then your clues would give hints to each nibble/byte or some other sequence of the sha256 hex string, not the passphrase. (Can you clarify?)
So, for example, clue #3 may refer to 'DEAF'.
July 16, 2013, 05:38:51 AM
Nice idea 
A very hard puzzle with a get-it-yourself cash reward; I hope to see them in newspapers soon.
A very hard puzzle with a get-it-yourself cash reward; I hope to see them in newspapers soon.
July 16, 2013, 03:36:14 AM
Well, you can be certain nobody will choose to fund if the hints are for free
I more useful hint would be nice though. How long is the password ?
I more useful hint would be nice though. How long is the password ?
It's a 32-byte hexadecimal string.
Hi
You said that it is 32 bytes hex, and that you typed in words... which is it? Do you mean a 32 character phrase like
"hi my name is not frederickly or"
?
July 16, 2013, 02:43:25 AM
That address looks like it was generated with a vanity gen. Is the "1Natimo" prefix intentional?
If so, I'm skeptical. The private keys generated by brain wallet are sha256 hashes of a passphrase. I don't see how you could come up with a passphrase that would generate a 256 bit private key which in turn would generate a public address beginning with "1Natimo". The pass phrase would just look like random characters and have no meaning.
If so, I'm skeptical. The private keys generated by brain wallet are sha256 hashes of a passphrase. I don't see how you could come up with a passphrase that would generate a 256 bit private key which in turn would generate a public address beginning with "1Natimo". The pass phrase would just look like random characters and have no meaning.
I swear to GOD the passphrase was created with brainwallet mate. Thats the funny part. As soon as I typed the last word in thats how the address looked and I debated keep the address for myself! Its a brainwallet address
July 16, 2013, 02:28:54 AM
Well, you can be certain nobody will choose to fund if the hints are for free
I more useful hint would be nice though. How long is the password ?
I more useful hint would be nice though. How long is the password ?
It's a 32-byte hexadecimal string.
July 16, 2013, 01:38:58 AM
That address looks like it was generated with a vanity gen. Is the "1Natimo" prefix intentional?
If so, I'm skeptical. The private keys generated by brain wallet are sha256 hashes of a passphrase. I don't see how you could come up with a passphrase that would generate a 256 bit private key which in turn would generate a public address beginning with "1Natimo". The pass phrase would just look like random characters and have no meaning.
If so, I'm skeptical. The private keys generated by brain wallet are sha256 hashes of a passphrase. I don't see how you could come up with a passphrase that would generate a 256 bit private key which in turn would generate a public address beginning with "1Natimo". The pass phrase would just look like random characters and have no meaning.
July 16, 2013, 01:32:42 AM
Well, you can be certain nobody will choose to fund if the hints are for free
I more useful hint would be nice though. How long is the password ?
I more useful hint would be nice though. How long is the password ?
July 15, 2013, 11:52:15 PM
Interesting. So we pm you with our guesses?
July 15, 2013, 05:21:30 PM
thats fine, you dont have to fund it. I will still add a hint a day. I have no intentions of scamming anyone. I did my part and put the 1btc in. if it stays like that then so be it. irdc to be honest
July 15, 2013, 05:19:00 PM
Basically ya'll fund the hints.
...
NO COINS WILL GO TO ME.
...
NO COINS WILL GO TO ME.
Nobody in their right mind will fund your wallet with nothing more than that assurance that you're not going to simply take the coins and run.
July 15, 2013, 04:38:01 PM
Yeah I understand. I honestly could care less about stealing coins in all seriousness. I have a wallet with over 200 btc... The last thing on my mind is trying to take peoples coins. But like I said you don't have to fund it to attempt to solve it. I might consider releasing one hint a day along with this just in case people don't fund it. Thanks for the feedback and advice though
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