Make your Bitcoins anonymous | Free coinjoin coordinator

[Kruw]

Liquisabi stats for the month of December:

[Kruw]

MASSIVE volume today with over 300 new BTC counted by Liquisabi: https://njump.me/nevent1qqsp93u5ztcrza0a099km64tfct6u4r7g24fntfjxxtmelralycyrlgppemhxue69uhkummn9ekx7mp0qgsw23lc30574v5ng0mjq56kdpnkw6vhuzcdnzp6d0dqntzt8utecccrqsqqqqqpje27v8

[Kruw]

New record, most inputs (447): https://mempool.space/tx/93d31d3c51e48a5583ccdc2e9342e7c07c95531825c03e7dc6807cb27be48155

[Kruw]

I'll be reformatting the guides (and the layout of the website in general). Here's a new addition for users who want more insight into the optimal way to handle their anonymous Bitcoins:

Put yourself in the perspective of an attacker/spy: Are they considering the proximity of your UTXOs within rounds, or the timing/volume of coin movements?

There's 3 aspects of UTXO proximity to consider:

A: Preventing input to input links
B: Preventing input to output links
C: Preventing output to output links

A is handled by the "Red coin isolation" feature. If you have an extremely large amount of BTC compared to the rest of the coinjoin participants, then the "exclude coins" feature can be used to further limit the amount of liquidity you send into a single round.
B is handled by remixing. Increasing your anonymity score target will add more distance between the coins you receive and the coins you spend.
C is probably the trickiest for users to handle. Consolidating coinjoin outputs in payments obviously reveals the same user owns them, but this action is only a marginal privacy loss, not a deterministic link. PayInCoinjoin is the best solution for this.

Timing and volume analysis of coin movements is mitigated with extra randomness provided by the client, Whenever you transact and create nonprivate (anon score 1) coins, Wasabi will automatically remix some of your coins that have already reached their anonymity score target. This resets the age of those coins and morphs the total amount you receive from the coinjoin so it doesn't match the value of the nonprivate coin you intend to anonymize.

One thing to consider is that ~98% of coinjoined UTXOs are spent or remixed within the first month they are created, so you want your behavior to blend in with the rest of the crowd. You can increase your privacy by waiting ~1-7 days in between coinjoin rounds, but if you waited several months between your coinjoin rounds, you would probably decrease your privacy.

You didn't mention it, but another pro tip is to avoid starting the coinjoin input registration if you know you will have to pause it later. Abandoning or disconnecting a coinjoin round leaks a small amount of metadata to the coordinator and/or other coinjoin participants (depending on the phase), so try to complete rounds if you've already registered more than 1 input to it.

Source: https://github.com/orgs/WalletWasabi/discussions/13708#discussioncomment-11969261

[Kruw]

Liquisabi stats for the month of January:

[tempuser364]

Question:
I coinjoined my funds to a new wallet in Wasabi. With time the privacy progress of that wallet has declined to 0%.
Do I need to do a new coinjoin to regain privacy again, or are still the coins basically private since they all originate from a coinjoin?

[BlackHatCoiner]

Do I need to do a new coinjoin to regain privacy again, or are still the coins basically private since they all originate from a coinjoin?

It depends on how you've spent them. For example, if the progress declined to 0% because of one big consolidation, then it is more obvious where the coins originate from. But, if you've spent them separately, then it's better.

My understanding is that once they're joined, you've broken the potential connection they could have with the past, but once you start spending them again, a new coin history begins, where privacy declines as they are becoming spent and new change is created. So, once you consider that the current coins have "served their time" or "history", you could just join them again.

[tempuser364]

Yeah I've probably done about 100 transactions or so since I did the coinjoin 7 months ago.. but I too thought that since they all once originate from coinjoin the underlying privacy would remain, but still maybe best to do a new coinjoin just to be sure.

[Kruw]

Question:
I coinjoined my funds to a new wallet in Wasabi. With time the privacy progress of that wallet has declined to 0%.
Do I need to do a new coinjoin to regain privacy again, or are still the coins basically private since they all originate from a coinjoin?

If you used the "Coinjoin to another wallet" feature, then the order in which you load your wallets affects your privacy %: https://github.com/WalletWasabi/WalletWasabi/issues/13003

Yeah I've probably done about 100 transactions or so since I did the coinjoin 7 months ago.. but I too thought that since they all once originate from coinjoin the underlying privacy would remain, but still maybe best to do a new coinjoin just to be sure.

A coinjoin has to be performed in between each transaction in order to prevent them from being linked together.

[Kruw]

Since mining fees are a little higher than usual, I've reduced the coinjoin round interval from 50 minutes to 1 hour to improve block space efficiency.

[Kruw]

Liquisabi stats for the month of February:

[aphoxiseus]

My coinjoined funds were blocked by an exchanger, is this normal?

[Kruw]

My coinjoined funds were blocked by an exchanger, is this normal?

I don't know, what exchange did you use?

[aphoxiseus]

quickex.io.

[Kruw]

quickex.io.

The documentation on their website shows they have a huge list of reasons they will use to extort their depositors with additional fees:

3.4 Based on the results of a positive KYC check, the client will be refunded with a commission of 5%.

   4. Please note that our service reserves the right to charge an additional fee of up to 5% on transactions if they have high-risk characteristics, such as:

I would find a new exchange.

[Quickex Exchange]

I would find a new exchange.

Hello! Let us clarify a few points to alleviate your worries about Quickex:

Firstly, we offer a free AML check. Before making an exchange, you can contact our support team and provide the transaction address for checking. This will help avoid blocks. This feature is specifically designed so users can ensure the "cleanliness" of their transactions.

Secondly, in this specific case, high risk tags were detected in the client's transaction. This could mean that the sender or recipient of the funds has been previously involved in suspicious activities. We are obliged to stop the transaction in cases like this to avoid consequences for our business, as we don't work with "dirty" liquidity.

Finally, we only apply the 5% fee in exceptional cases, to very small amounts, to cover our own operational costs. This is done to ensure the service can operate even when processing minimal sums. This rule does not apply for greater amounts.

We are absolutely transparent in our operations. All information about AML checks and fees is available on our website. We are also ready to promptly conduct KYC verification and discuss the possibility of a refund, if applicable. Our goal is to provide a comfortable and secure experience for all our users. We kindly ask the user to contact our support team so we can review the situation individually.

[Kruw]

I've sped up the input registration time for each round to 45 minutes while the mempool is empty.

[JollyGood]

Your reply seems as though it is more related to you using the opportunity to promote your services akin to an advert rather than a reply. It is remarkable coincidence you found the post from the complainant in this thread in record timing. As you have mentioned the allegation you have covered that aspect but if coinjoin coordinators are considered high risk and "dirty" liquidity, why not put that information on your website in large bright fonts making unmissable?

Hello! Let us clarify a few points to alleviate your worries about Quickex:

Firstly, we offer a free AML check. Before making an exchange, you can contact our support team and provide the transaction address for checking. This will help avoid blocks. This feature is specifically designed so users can ensure the "cleanliness" of their transactions.

Secondly, in this specific case, high risk tags were detected in the client's transaction. This could mean that the sender or recipient of the funds has been previously involved in suspicious activities. We are obliged to stop the transaction in cases like this to avoid consequences for our business, as we don't work with "dirty" liquidity.

Finally, we only apply the 5% fee in exceptional cases, to very small amounts, to cover our own operational costs. This is done to ensure the service can operate even when processing minimal sums. This rule does not apply for greater amounts.

We are absolutely transparent in our operations. All information about AML checks and fees is available on our website. We are also ready to promptly conduct KYC verification and discuss the possibility of a refund, if applicable. Our goal is to provide a comfortable and secure experience for all our users. We kindly ask the user to contact our support team so we can review the situation individually.

[Quickex Exchange]

Your reply seems as though it is more related to you using the opportunity to promote your services akin to an advert rather than a reply. It is remarkable coincidence you found the post from the complainant in this thread in record timing. As you have mentioned the allegation you have covered that aspect but if coinjoin coordinators are considered high risk and "dirty" liquidity, why not put that information on your website in large bright fonts making unmissable?

You rightly noted that we responded to in this topic very quickly, but this is nothing unusual. We use the BitcoinTalk Super Notifier V2 Telegram bot, so if someone on the forum mentions Quickex, we immediately receive a notification.

Regarding the blocking of funds from coinjoin service - this case is rather an exception, there has not been a single case like this for a long time. We cannot say for sure what exactly the matter is. Perhaps the conjoin service itself has nothing to do with it, and the coins had high risk marks for some other reasons. In any case, our website has all the information about AML, we do not hide anything.

[examplens]

Regarding the blocking of funds from coinjoin service - this case is rather an exception, there has not been a single case like this for a long time.

There have been no such cases, but one has happened. And that one is enough to consider yourself at risk for users' funds.
In the end, did @aphoxiseus get his coins back?