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I'm willing to accept all of this.
my question is about the ease with which someone can identify the common ancestor from before the tx0 if 2 or more of the 5 outputs from the tx0 are later recombined.
for instance if I had a single kyc'd utxo which tx0 split into 5 equal utxos and then those go through many rounds of whirlpool mixing, does combining any number of them trivially link them back to the original kyc'd input (since it is the obvious origin of all five)?
my question is about the ease with which someone can identify the common ancestor from before the tx0 if 2 or more of the 5 outputs from the tx0 are later recombined.
Easily, and in some cases, with certainty. The structure of Whirlpool makes this worse, but it's an underlying problem for any private currency system: Some people have realllllly short time preferences that undermine their anonymity.
Samourai's absence from the community unironically prevented Bitcoin from being destroyed.
Can you explain how Samourai's presence in the community would have destroyed bitcoin?
see an example here: https://bitcointalk.org/index.php?topic=5482818.msg63551707#msg63551707
A reply for more context:
Look man, I don't know what you're trying to do here. Don't you have enough with 15 neutral color tags but basically saying you're a piece of shit? Now you want to open a rational debate by quoting someone who is going to die? If it's because Wasabi pays you to represent them on the forum, the best thing you can do is stop doing it. Otherwise you're just going to inspire more hate.
Those angry replies are from the "mixer site" cartel that took over Bitcointalk's merit and trust system. ChipMixer then scammed all of them. That's basically the reason the site died: Everyone cycles merit and farms spam to get payouts from corrupt advertising campaign managers.
It's a good thing we have Nostr and Stacker News. Otherwise, we would be stuck with that bullshit, X, and fucking reddit.
Whirlpool has worse privacy, fees, speed, and custody model than a regular Bitcoin payment:
-The privacy is worse than sending normal on chain payments because tx0 always reveals common input ownership and creates change
-The fee is worse than on chain payments because the victim wastes fees in tx0, wastes fees remixing sybil attackers, and wastes fees paying the coordinator (feeding the attacker)
-The speed is worse than a regular payment because you have to confirm tx0, then Whirlpool, then spend. Best case scenario 30 minutes.
-The trust model is worse than a regular payment because the coordinator can just steal your fees in tx0 and never whirlpool your coins.
Samourai's absence from the community unironically prevented Bitcoin from being destroyed. It is a downgrade for users in every possible category, see an example here: https://bitcointalk.org/index.php?topic=5482818.msg63551707#msg63551707
I had a fantasy about building a tool that shows your exposed Whirlpool data for a long time, but it would have been pointless since it would not include the xpub data from Samourai and the Electrum data from Sparrow. But now it is relevant since Ashigaru at least requires Tor, so a tool that tracks the on chain peeling that is built in to tx0 would be mostly accurate from a third party blockchain viewer perspective.