5 ms·

Not really. Invalid transaction wouldn't get propagated so you'd need valid ones and they cost money. So an attack has a cost per hour and this cost is pretty

Not really. Invalid transaction wouldn't get propagated so you'd need valid ones and they cost money. So an attack has a cost per hour and this cost is pretty high.

pjc50 10y ago
Only confirmed transactions cost money. So in theory you could send each miner a different double-spend, which they'd have to hang on to until either they confirmed it or received a contradictory confirmed transaction.
- csomar 10y ago
  You can't really send a different double-spend to each miner. In my experience, the transaction will be propagated in 1-3 seconds. Each miner will pick the one it prefers (some prefer first seen, some prefer highest fee)
shshhdhs 10y ago
Couldn't an attacker with multiple accounts just pay themselves?
- Taek 10y ago
  You have to pay transaction fees to the miners.
  - shshhdhs 10y ago
    And what if the attackers were also the miners. Unless I am missing something, shouldn't the fee be zero-sum?