There was some discussion of having nodes relay double-spends in order to alert the network about double spend attempts.
A lot more users will be using SPV wallets in the future, and one of the techniques SPV clients use to judge how likely a transaction is to be confirmed is if it propagates across the network. I wonder if and when double-spend relaying is introduced, if nodes should also send BIP61 reject messages or something along those lines to indicate which transactions those nodes believe to be invalid, but are relaying anyway. This would be subject to sybil attacks, as is monitoring propagation, however it does still increase the cost of performing a 0 confirmation double spend attack on an SPV client above just relaying double-spends without indicating if a node believes the transaction to be valid. Aaron Voisine breadwallet.com ------------------------------------------------------------------------------ Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
