Questions tagged [hacking]
53 questions
17
votes
3 answers
How do you derive the private key from two signatures that share the same k value?
I wrote my own ECDSA signature algorithm just for the purpose of creating unit tests.
With it I created two signatures which went into transaction 56ec7ca7df..., sending from 1GXFXm3es.... These signatures used the same k values, although k values…
Thorkil Værge
- 1,047
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13
votes
3 answers
What's stopping someone from taking over all the bitcoin addresses?
Anyone can generate unlimited bitcoin addresses.
Presumably, there's a limited number of these (even if it's a very very large number).
What's stopping someone from taking over all the bitcoin addresses? (If the answer is current computer speeds, is…
thanks_in_advance
- 463
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8
votes
2 answers
If SHA256 and/or RIPEMD-160 were broken, would all bitcoin addresses be compromised?
If not, what else would be needed to steal all funds from all people and completely break bitcoin?
I bet some will say ECSDA gives bitcoin an additional layer of protection. I counter this by saying ECSDA is dependent on a hash function such as…
John Smith
- 93
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- 4
8
votes
1 answer
When to worry about 1-confirmation payments
A customer sends me a payment for some digital good at my service, where delayed delivery is a deal-breaker, so I only wait for 1 confirmation by the network before releasing the links for the purchased digital item.
The prices of these itemsrange…
Doug Peters
- 1,366
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8
votes
4 answers
Secure way to store BTC over a long time - and its risks?
What are the most secure way to store a huge amount of BTC over a long time and its (detailed) risks? A other assumption is that the owner does not have a very technical background, thus it will not be possible to verify the code of a wallet…
user599464
- 446
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7
votes
1 answer
How much Bitcoin was lost in the Jul. 2011 MyBitcoin site shutdown incident?
https://en.bitcoin.it/wiki/MyBitcoin
How much money was lost when it shut down? (You can also edit the wiki page and add this info). Best estimates of course.
ripper234
- 26,452
- 30
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7
votes
3 answers
Hacked my blockchain.info wallet, stole 760 coins
Two days ago my wallet at blockchain.info was hacked, everything was taken (760 coins).
https://blockchain.info/tx/0619d221a761a3b8ec205773440fa6607d65957ef985dac5fb5273a08bda2c89
Besides the password I use Google two step verification. I also use…
Bastiaan Quast
- 371
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- 10
6
votes
1 answer
What could be the impact of the distribution of "tainted" Bitcoinica coins?
The hacker was distributing them in IRC recently, and sent some to the Bitcoin Faucet. Is this a reliable method for evading the "Bitcoin Police"?
Here's a forum thread discussing the distribution and a pastebin of the IRC conversation. Pasted below…
Eric Blank
- 61
- 2
5
votes
2 answers
Can a clever hacker still steal everyone's money from the blockchain.info wallet?
Blockchain.info claims:
We cannot (and don't want to):
View your balance
View your address book
Make transactions on your behalf
Confiscate your wallet
Lock you into our service.
They do this by only storing the encrypted wallet file containing…
Claudiu
- 447
- 3
- 9
5
votes
4 answers
I just lost 1.36275883 ($313), and I don't know how it happened or how to prevent it again
I just opened my multi bit wallet, and the 1.36275883 that was in there is now gone. It loaded a brand new wallet, so I don't even have my old wallet with the old transactions or password. I know what my old address was. I checked it on…
guest
- 59
- 1
4
votes
1 answer
What happened to my coins, hacked?
I'm new to bitcoin, downloaded the bitcoin.org client, encrypted my wallet, and purchase a few bitcoins (5.25), for learning purposes. But now my coins seem to have disappeared to an unknown address.
You can follow the chain…
David B
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4
votes
1 answer
How do Blockchain.info recovery mnemonics encrypt wallet data and what prevents hacking of the algorithm?
How do mnemonics encrypt wallet data and what prevents hacking of the algorithm?
For example Blockchain seems to encrypt all data using a mnemonic yet doesn't hold customer data server side.
What prevents creating numerous Blockchain wallets,…
Wizard Of Ozzie
- 5,268
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3
votes
1 answer
What's relationship to each address other in Bitcoin Core?
I just made two and more address in Bitcoin Core wallet.
Is there any relationship to each address? Like based on seedphase? or Just literally making 'random' address?
If so, an attacker can hack the other address if knows one of private…
bitcoinlearner
- 369
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3
votes
1 answer
What was the timeline of the Bitcoin Unlimited Hack as of 2017-March and where was it in the code?
I've been trying to follow the Bitcoin Unlimited hack timeline (2017-Mar) and there seems to be conflicting stories on both sides. It's obviously to confuse the 3rd party into finding the truth. My main questions are:
When was the exploit…
Patoshi パトシ
- 10,956
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3
votes
3 answers
Are hacked bitcoins spendable?
700,000 BTC were stolen from MTGox. So are they actually spendable by the hacker or are they now just lost to the world? I can understand wallets being encrypted, but why aren't individual BTC encrypted with the owners private key so that a stolen…
michaelbinary
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