Everybody is always saying to churn by sweeping the coin. Makes sense, works neatly to keep coins apart. But my thinking is when sweeping your tx only has 1 output. As most transactions have at least a second output for change, doesn’t this make a sweep tx look like a high probability churn in the blockchain?
Interesting. Could you explain a bit more? I understand ring signature makes guessing the origin a 1/16 chance. But with stealth addresses and RingCTs you can’t know where it was sent or the amount that was sent. Lets say XMR gets transferred from A to B to C to D. Even without ring signatures, how could you derive that A’s XMR ended up at D? All we know is that A,B and C sent XMR but not knowing the amounts or where it was sent, there is no knowable or guessable relation between those transactions right?
And even you aggregate lets say 10 inputs marked by an exchange, wouldn’t churning that new single input a few times make it hard to link transactions from the newly churned input to the 10 original ones from the exchange?
FCMP that’s the proposed change that increases the ring signature size effectively from 16 to 100k right? Is that update already in the making and expected ready for release in the near future?