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Title: Possible 51% attack on bitcoin??? Post by: subzero666 on September 28, 2012, 02:20:40 PM Related to this Topic https://bitcointalk.org/index.php?topic=113654.msg1228029 (https://bitcointalk.org/index.php?topic=113654.msg1228029) probably someone could post from this one to mine (im newbie) i found this very interesting -->
http://blockchain.info/hub-nodes (http://blockchain.info/hub-nodes) 131.159.18.37 atbeetz8.informatik.tu-muenchen.de http://blockchain.info/ip-address/131.159.18.37 (http://blockchain.info/ip-address/131.159.18.37) Looks like they try massive doublespends to there own Wallet... http://blockchain.info/address/1VayNert3x1KzbpzMGt2qdqrAThiRovi8 (http://blockchain.info/address/1VayNert3x1KzbpzMGt2qdqrAThiRovi8) What you think about? Sorry for my bad english ;) Title: Re: Possible 51% attack on bitcoin??? Post by: thepwnorbpwnd on September 28, 2012, 02:27:42 PM I forgot whose this was but he's a pool owner.
Title: Re: Possible 51% attack on bitcoin??? Post by: Stephen Gornick on September 28, 2012, 02:53:26 PM What you think about? There are various methods to succeed at double spending that do not require the immense amount of resources that a 51% attack would require. An individual user can attempt a race attack. Or a solo mining operator or a mining pool can try a Finney attack. - http://en.bitcoin.it/wiki/Double-spending But there's nothing stopping the broadcasting of invalid transactions that attempt to double spend. There is a chance this happen accidentally (e.g., having two copies of a wallet and spending from the second copy before the blockchain has finished downloading where it didn't know the coins were already spent). More likely when these transactions occur it is from fraudulent attempts to double spend. There have even been legitimate attempts to optimize "coin management" by services like SatoshiDICE that have gone bad and spewed many invalid double spend transactions to the network. Title: Re: Possible 51% attack on bitcoin??? Post by: sadpandatech on September 28, 2012, 03:06:42 PM https://bitcointalk.org/index.php?topic=113672.msg1228380#msg1228380
https://bitcointalk.org/index.php?topic=113654.0 Title: Re: Possible 51% attack on bitcoin??? Post by: Monkey1 on September 28, 2012, 04:06:15 PM You will need to be quick to execute a sucessful double spend. Once it is obvious this has happened, confidence in BTC will plummet and any BTC that you have double spent will become worthless.
Title: Re: Possible 51% attack on bitcoin??? Post by: Raoul Duke on September 28, 2012, 04:11:59 PM That address(1VayNert...) belongs to Deepbit.
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