Condorcet Attack Against Fair Transaction Ordering. (arXiv:2306.15743v1 [cs.CR])

We introduce the Condorcet attack, a new threat to fair transaction ordering.
Specifically, the attack undermines batch-order-fairness, the strongest notion
of transaction fair ordering proposed to date. The batch-order-fairness
guarantees that a transaction tx is ordered before tx' if a majority of nodes
in the system receive tx before tx'; the only exception (due to an
impossibility result) is when tx and tx' fall into a so-called "Condorcet
cycle". When this happens, tx and tx' along with other transactions within …

attack batch fair fairness nodes order system threat transaction