Brutforcing a wallet

[Nephilims]

I imagine in this thread I know the least about the technical aspects of cryptocurrencies and this may be a bit off topic, but when bitcoins reached $1,200 I was curious to know how secure they were, so I gave my kid a task. He had 2 hours to see how many bitcoin addresses he could generate while checking each one for a positive balance. He found 3 accounts that contained many many bitcoins, I was so tempted to take them, that I had to delete his internet history.

Yeah ok... Do you know how bitcoin addresses are even generated? Most applications have very unique entropy, so just by generating addresses you probably wouldn't get any hits. What was he using for the entropy source?

He typed long strings of random characters to generate each address.

[gadman2]

I imagine in this thread I know the least about the technical aspects of cryptocurrencies and this may be a bit off topic, but when bitcoins reached $1,200 I was curious to know how secure they were, so I gave my kid a task. He had 2 hours to see how many bitcoin addresses he could generate while checking each one for a positive balance. He found 3 accounts that contained many many bitcoins, I was so tempted to take them, that I had to delete his internet history.

Yeah ok... Do you know how bitcoin addresses are even generated? Most applications have very unique entropy, so just by generating addresses you probably wouldn't get any hits. What was he using for the entropy source?

He typed long strings of random characters to generate each address.

El oh El. Troll.

[Nephilims]

I imagine in this thread I know the least about the technical aspects of cryptocurrencies and this may be a bit off topic, but when bitcoins reached $1,200 I was curious to know how secure they were, so I gave my kid a task. He had 2 hours to see how many bitcoin addresses he could generate while checking each one for a positive balance. He found 3 accounts that contained many many bitcoins, I was so tempted to take them, that I had to delete his internet history.

Yeah ok... Do you know how bitcoin addresses are even generated? Most applications have very unique entropy, so just by generating addresses you probably wouldn't get any hits. What was he using for the entropy source?

He typed long strings of random characters to generate each address.

El oh El. Troll.

I am not trolling

After seeing that, I assume it is very easy to generate addresses that contain coins and that you guys have to be aware of it. I forgot to mention he also found a few accounts that previously had coins too. But like I said, I am not trolling, just sharing my experience with the community.

[samurai1200]

Um.

[U1TRA_L0RD]

I Really want to build a super GPU computer consisting of over 30 High end GPU's and take everyones BTC.

[byt411]

I Really want to build a super GPU computer consisting of over 30 High end GPU's and take everyones BTC.

LOL that is obvious, look at your trust rating!

[Nancarrow]

Well, the "laws of the universe" know time dilletation right?
You could cause a computer, which is accellerated to near light speed, to bruteforce for 100.000.000.000 years (your picture states that power consumption is negligable)  while here on earth only a few seconds pass by. This is Einstein's "laws of the universe".  

Unfortunately "Einstein's laws of the universe" work precisely the other way round. Bump something up to near lightspeed for however long you like, then bring it back, it'll only have run SLOWER than if you'd left it on Earth.

http://en.wikipedia.org/wiki/Time_dilation

[cr1776]

Well, the "laws of the universe" know time dilletation right?
You could cause a computer, which is accellerated to near light speed, to bruteforce for 100.000.000.000 years (your picture states that power consumption is negligable)  while here on earth only a few seconds pass by. This is Einstein's "laws of the universe".  

Unfortunately "Einstein's laws of the universe" work precisely the other way round. Bump something up to near lightspeed for however long you like, then bring it back, it'll only have run SLOWER than if you'd left it on Earth.

http://en.wikipedia.org/wiki/Time_dilation

I'm glad I read to the end of the thread before pointing this out too.  ;-) 

[U1TRA_L0RD]

I Really want to build a super GPU computer consisting of over 30 High end GPU's and take everyones BTC.

LOL that is obvious, look at your trust rating!

Not even close to being a scammer, A scammer buster, I had to give negative to warn the community and I got negative back, Read before talking buddy

[sase007]

Well... you can try to bruteforce wallet if you have enought time...


 
enought time = a few thousand years

[U1TRA_L0RD]

Well... you can try to bruteforce wallet if you have enought time...


 
enought time = a few thousand years

I will have to take out my wizardry book to enhance the GPU's xD

[sase007]

Well... you can try to bruteforce wallet if you have enought time...


 
enought time = a few thousand years

I will have to take out my wizardry book to enhance the GPU's xD

lol

But seriously now:

he could do it (in theory) if he has blessing of night mother...
It is like solo mining... you can find block in 1 minute or never

[Altoidnerd]

You will be happy to know brute forcing takes a little bit longer on the surface of the earth as clocks tick slower here than in free space.

If you sent away a brute forcing computer at high speeds, it would appear from earth's vantage point to be brute forcing more slowly.  So the brute force starship attack by brute speed is fundamentally flawed.

[odolvlobo]

Do not believe these disbelievers, nor believe all these eye catching "all addresses are safe" posters.
Just take a look at my video (http://www.youtube.com/watch?v=TC43aOdsf4g&hd=1) where I actually crack a private key live on camera.
All transactions in this video are performed on the real block chain, and can be verified on blockchain.info.

First off how do we know you entropy was not something like 1 and the cracker just generated that character first. This shows no flaw, it shows nothing. You took a public key from an unknown entropy and got the private key. You didn't brute force any private key. Until you brute force my private key, this video is invalid.

Lol, if the entropy was 1 we would have only two different addresses generated. But the random address generator was generating dozens of different addresses. More precisely, the entropy came from pythons "random.randrange()".
Actually, now I know that you are just trolling as you seem to ignore everything that I try to explain. You said it is not possible to crack any private_key ... but I have just cracked a private key in seconds. A private key of a legit bitcoin address verified on blockchain.info. So your statement is clearly not true.

You have demonstrated that random.randrange() can be an extremely poor entropy generator. I hope that no real bitcoin address generator uses that function to generate addresses, though I guess it is possible that someone might use it.

[Evil-Knievel]

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[flatfly]

Do not believe these disbelievers, nor believe all these eye catching "all addresses are safe" posters.
Just take a look at my video (http://www.youtube.com/watch?v=TC43aOdsf4g&hd=1) where I actually crack a private key live on camera.
All transactions in this video are performed on the real block chain, and can be verified on blockchain.info.

First off how do we know you entropy was not something like 1 and the cracker just generated that character first. This shows no flaw, it shows nothing. You took a public key from an unknown entropy and got the private key. You didn't brute force any private key. Until you brute force my private key, this video is invalid.

Lol, if the entropy was 1 we would have only two different addresses generated. But the random address generator was generating dozens of different addresses. More precisely, the entropy came from pythons "random.randrange()".
Actually, now I know that you are just trolling as you seem to ignore everything that I try to explain. You said it is not possible to crack any private_key ... but I have just cracked a private key in seconds. A private key of a legit bitcoin address verified on blockchain.info. So your statement is clearly not true.

You have demonstrated that random.randrange() can be an extremely poor entropy generator. I hope that no real bitcoin address generator uses that function to generate addresses, though I guess it is possible that someone might use it.

hmmm.... for starters, randrange() is not a generator.

also, many wallets and tools use that function. One simple example is NoBrainr:
https://bitcointalk.org/index.php?topic=308972.0

I would like to challenge you to "crack" any key generated by it...

[Evil-Knievel]

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[flatfly]

flatfly: I have reviewed NoBrainr and I thing you do not need any of these sophisticated tools to crack addresses created by it.
Actually, a simple programmable calculator is enough.

Let me grab all cold wallets ever created with NoBrainr, and come back to this thread ;-)

I'm not convinced about your uber hax0r skills but you sure are entertaining

Of course, if you post a proof (other than a funny/shaky/blurry video), I'll review my statement

[Evil-Knievel]

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[prezbo]

flatfly: I have reviewed NoBrainr and I thing you do not need any of these sophisticated tools to crack addresses created by it.
Actually, a simple programmable calculator is enough.

Let me grab all cold wallets ever created with NoBrainr, and come back to this thread ;-)

I'm not convinced about your uber hax0r skills but you sure are entertaining

Of course, if you post a proof (other than a funny/shaky/blurry video), I'll review my statement

There is no proof needed:

Nobrainr:
Wordlist Length: 7776
Number of Random Words: 7
Size of Search Space: 7776^7 = 1.71 * 10²⁷
Maximum Possible Search Space: 2²⁵⁶ = 1.15 * 10⁷⁷
Result: Searchspace is Reduced to this percentage: 1.484618518476838608918817891513466139612896777*10^-50

I am starting right away, in the hope that anyone has a 1000 BTC cold wallet out there just waiting for me.

Good luck with that.