Quote from: DamienBlack on July 07, 2011, 07:52:00 AM

Quote from: bcearl on July 07, 2011, 07:50:56 AM

Quote from: mrb on July 07, 2011, 07:46:30 AM

Quote from: bcearl on July 07, 2011, 07:44:39 AM

Please answer to my posting: Your attack still assumes that you can split the internet. That you can dictate what blockchain each miner can see.

No need to "split the internet". The attacker simply withholds the block, on Tycho's server, that are being solved by the miners. Remember that these miners are not connected to the Bitcoin peer-to-peer network. There is no need to isolate them.

But you have to distribute the block in the whole mining pool to generate the next one.

No you don't. The pool pre-hashes all the data. The pool miners have no idea what they are working on, nor do they need to generate it themselves.

Then the problem is insecure pool design.