DieJohnny (OP)
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Activity: 1639
Merit: 1004
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November 09, 2015, 01:15:05 PM |
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What is the technical reason i cannot listen for new txns, modify them to spend to my address and rebroadcast as my own?
Txns are not encrypted, the target public address is visible and I can modify it and rebroadcast. What am I missing?
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Those who hold and those who are without property have ever formed distinct interests in society
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There are several different types of Bitcoin clients. The most secure are full nodes like Bitcoin Core, but full nodes are more resource-heavy, and they must do a lengthy initial syncing process. As a result, lightweight clients with somewhat less security are commonly used.
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Foxpup
Legendary
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Activity: 4340
Merit: 3042
Vile Vixen and Miss Bitcointalk 2021-2023
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November 09, 2015, 01:25:05 PM |
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You're missing signatures. |
Will pretend to do unspeakable things (while actually eating a taco) for bitcoins: 1K6d1EviQKX3SVKjPYmJGyWBb1avbmCFM4I am not on the scammers' paradise known as Telegram! Do not believe anyone claiming to be me off-forum without a signed message from the above address! Accept no excuses and make no exceptions! |
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DuddlyDoRight
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November 09, 2015, 09:08:07 PM |
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From what I know from testing and reading for some weeks with blockchain-spec and reference client: If I'm an attacker with the intention of cheating for coins I'm going to look in to forking and mining delayed blocks..
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I have faith that one day this forum will get threads where people won't just repeat their previous posts or what others have already stated in the same thread. Also that people will stop acting like BTC is toy-money and start holding vendors accountable. Naive? Maybe.
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dex1
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November 09, 2015, 09:54:35 PM |
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And to make one of them you need private keys. |
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yenxz
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November 12, 2015, 08:28:48 PM |
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is this really happen?what do you think about algorithm?what algorithm they use?
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mezzomix
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November 12, 2015, 09:22:17 PM |
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If I'm an attacker with the intention of cheating for coins I'm going to look in to forking and mining delayed blocks..
If you have enough money for this kind of attack you maybe can rollback/invalidate transactions but you are not able grab the coins from these transactions. |
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tommorisonwebdesign
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November 13, 2015, 01:21:00 PM |
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All transactions, as previously mentioned, are encrypted with digital keys. You would have to be an excellent programmer to break the encryption.
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Signatures? How about learning a skill... I don't care either way. Everybody has to make a living somehow.
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achow101
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Activity: 3374
Merit: 6535
Just writing some code
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November 13, 2015, 01:23:16 PM |
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All transactions, as previously mentioned, are encrypted with digital keys. You would have to be an excellent programmer to break the encryption.
They are not encrypted. They are signed, which means that if any data in that is signed changes, the signature won't match. |
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Bjiornulf
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November 14, 2015, 04:44:47 PM |
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But encryption and signature are pretty much the same thing, right?
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achow101
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Just writing some code
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November 14, 2015, 06:55:22 PM |
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But encryption and signature are pretty much the same thing, right?
No! Encryption is converting a plaintext data to ciphertext so that only a certain persons can know what the plaintext is. Signing requires that the message ( plaintext) is known. It proves that the data was not modified. |
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avw1982
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November 15, 2015, 04:42:22 PM |
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All transactions, as previously mentioned, are encrypted with digital keys. You would have to be an excellent programmer to break the encryption.
To encrypt the lost Bitcoin details is very hard dude. and he would get his Bitcoin from the hackers If he feels pity only. If he is a good person He could get from him. he willingly he hacked means you can't get your hard earnings back for sure |
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RealPhotoshoper
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November 18, 2015, 02:10:28 PM |
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hacking bitcoin transaction can be possible,as i read before that last year, Hacking Team already mentioned that they’re working on a feature that could expose transactions related to bitcoin and other cryptocurrencies. Documents have shown that this feature can also expose transactions using litecoin, feathercoin, and namecoin.
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prezbo
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November 18, 2015, 10:46:02 PM |
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hacking bitcoin transaction can be possible,as i read before that last year, Hacking Team already mentioned that they’re working on a feature that could expose transactions related to bitcoin and other cryptocurrencies. Documents have shown that this feature can also expose transactions using litecoin, feathercoin, and namecoin.
source? |
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makcik
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November 19, 2015, 04:41:31 PM |
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You are missing everything. Bitcoins work on a different security algorithm, simply modifying transactions and sending bitcoins to your address will never happen.
Wallet providers are not idiots, they use multi layered security and these methods won't work for it. I don't know the actual method, as I'm not interested in doing hacking. But, whatever it is.. It is complicated.
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achow101
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Activity: 3374
Merit: 6535
Just writing some code
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November 19, 2015, 05:33:55 PM |
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You are missing everything. Bitcoins work on a different security algorithm, simply modifying transactions and sending bitcoins to your address will never happen.
Wallet providers are not idiots, they use multi layered security and these methods won't work for it. I don't know the actual method, as I'm not interested in doing hacking. But, whatever it is.. It is complicated.
It is not just the wallet, it is built into the bitcoin protocol itself. |
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knightkon
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November 21, 2015, 01:00:24 AM |
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If I am understanding the correctly, all of the information in the BTC programming is needed in order for the block chain to properly work right. So I am guessing in order for you to do that, you would have to rewrite the complete block chain from the start so it all lines up. Am I on the right track with my thinking?
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shorena
Copper Member
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No I dont escrow anymore.
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November 21, 2015, 02:17:00 PM |
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If I am understanding the correctly, all of the information in the BTC programming is needed in order for the block chain to properly work right. So I am guessing in order for you to do that, you would have to rewrite the complete block chain from the start so it all lines up. Am I on the right track with my thinking?
No, "rewriting" the blockchain will not enable you to forge a signature. You either have to break ECDSA (or the specific curve used for bitcoin) or get the private key in question. Also not every single line of code within bitcoin core is needed for the protocoll to work. A large portion is the wallet part that is not required. |
Im not really here, its just your imagination.
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itod
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^ Will code for Bitcoins
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November 22, 2015, 09:31:18 PM |
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If I am understanding the correctly, all of the information in the BTC programming is needed in order for the block chain to properly work right. So I am guessing in order for you to do that, you would have to rewrite the complete block chain from the start so it all lines up. Am I on the right track with my thinking?
Forget about gaining Bitcoin quick and dirty way by hacking, it's not possible. Every part of the Bitcoin security practices was carefully reviewed by the world's greatest security experts, and there are no holes in them. This doesn't mean you shouldn't take your time to learn as much as you can about Bitcoin code, because you can actually get money from that by offering your programming services to others once you figure out what exactly is going on there. |
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lottoshares
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November 26, 2015, 11:08:02 PM |
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If I am understanding the correctly, all of the information in the BTC programming is needed in order for the block chain to properly work right. So I am guessing in order for you to do that, you would have to rewrite the complete block chain from the start so it all lines up. Am I on the right track with my thinking?
No, "rewriting" the blockchain will not enable you to forge a signature. You either have to break ECDSA (or the specific curve used for bitcoin) or get the private key in question. Also not every single line of code within bitcoin core is needed for the protocoll to work. A large portion is the wallet part that is not required. Rewriting the blockchain is impossible for anything but the most recent blocks, and rewriting those would need over 50% of the computational power of the entire network. Each block in the blockchain contains a hash of the previous block in its header. If you attempt to change anything in the previous block its hash changes, and the next block needs to store that changed hash in its header. All Bitcoin nodes store a copy of the blockchain containing those hashes, and if you attempted changing an old block they would refuse to accept it as valid because its hash wouldn't match theirs. |
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watashi-kokoto
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December 02, 2015, 03:08:38 PM |
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1. there is nothing encrypted.
2. in user wallet there is a hidden secret "private key" only the true owner of coin can sign "spend" his coin.
3. singature becomes invalid when you change anything in the transaction.
- you cannot change the amount
- you cannot change the destination
3. the obstacle to "fake" this signature is
- you do not know the key: solution: steal the wallet
- you cannot fake ECDSA signature: solution: hack ECDSA
- you cannot change payment: solution: find a SHA collision or RIPEMD collision
currently
ECDSA has not been hacked (nobody knows how to do it)
SHA collision has not been found (nobody knows how to find it)
RIPEMD collision has not been found (nobody knows how to find it)
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