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Author Topic: ♻️ CRYPTOMIXER.IO — FAST, SECURE and RELIABLE BITCOIN MIXER (Since 2016) ⭐⭐⭐⭐⭐  (Read 43050 times)
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January 15, 2018, 10:14:53 PM
 #261

what kind improvement for this year?

Usability and speed
Despite the fact that I was always positive about your mixing service because it always reminds me bitmixer, everything has changed in my mind.
At first I want to ask you, maybe pretty old question, but want to get answer on it: You really own that number of bitcoins as you claim, you showed us proof, messages from those wallets were verified by DT members but is it safe for your users? Someone ever knew your wallets where you stored major bitcoins.... Wasn't that a silly action?


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January 17, 2018, 07:13:30 PM
Last edit: February 08, 2018, 09:57:02 PM by CryptoMixer.io
 #262

what kind improvement for this year?

Usability and speed
Despite the fact that I was always positive about your mixing service because it always reminds me bitmixer, everything has changed in my mind.
At first I want to ask you, maybe pretty old question, but want to get answer on it: You really own that number of bitcoins as you claim, you showed us proof, messages from those wallets were verified by DT members but is it safe for your users? Someone ever knew your wallets where you stored major bitcoins.... Wasn't that a silly action?

Thank you for your question, but dont let this fact confuse you. It only proves that in a certain moment of time there were a certain amount of coins in operation. All coins in reserve are being in the constant circulation, they have no links with the source or destination addresses and fresh coins are constantly entering the reserve.
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February 12, 2018, 10:13:18 PM
 #263

ANNOUNCEMENT

Don't be confused by the new online chat widget on our website — we have changed it. E-mail support@cryptomixer.io works as well. Feel free to mix your coins!
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February 17, 2018, 12:26:24 PM
Merited by Reatim (1)
 #264

I am using your service for a long time now and I am very satisfied with it. But lately I have been investigating possibilities to track transactions which were send over mixing services and I found two possible attack vectors to cluster transactions which were mixed with your service.

The first one is less effective but there is still a decent risk. The transaction fees of your service are constant when the transaction has the same size. For example three transactions with one input and two output addresses had the same size of 42.598 sat/B. Obviously the fees vary when there are more input addresses but most of the time I received transactions with one input two output and the fees were constant.

The second is more severe. Let's say we have a setup of x-forward addresses and all of them are differently delayed in time. Normally you should think that this setup is bullet proof but it isn't. As the delay steps in your service are hour based and your service is sending the transactions at exactly the same time just hourly shifted (for example: 01-01 21:10:21, 01-01 14:12:20, 01-01 03:12:18) it is easy to cluster all transactions which are connected to one mixing step. With the help of the first attack vector the analysis becomes even more effective.

With the help of those information it should be no big deal for future blockchain analysis techniques to track down the source of mixed coins. This is a big risk for a mixing service which should offer a high grade of privacy.

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.
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February 20, 2018, 07:44:51 PM
Merited by Reatim (1)
 #265

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

These improvements sound reasonable. We are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. Thank you for your feedback!
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February 20, 2018, 07:51:06 PM
 #266

I am using your service for a long time now and I am very satisfied with it. But lately I have been investigating possibilities to track transactions which were send over mixing services and I found two possible attack vectors to cluster transactions which were mixed with your service.

The first one is less effective but there is still a decent risk. The transaction fees of your service are constant when the transaction has the same size. For example three transactions with one input and two output addresses had the same size of 42.598 sat/B. Obviously the fees vary when there are more input addresses but most of the time I received transactions with one input two output and the fees were constant.

The second is more severe. Let's say we have a setup of x-forward addresses and all of them are differently delayed in time. Normally you should think that this setup is bullet proof but it isn't. As the delay steps in your service are hour based and your service is sending the transactions at exactly the same time just hourly shifted (for example: 01-01 21:10:21, 01-01 14:12:20, 01-01 03:12:18) it is easy to cluster all transactions which are connected to one mixing step. With the help of the first attack vector the analysis becomes even more effective.

With the help of those information it should be no big deal for future blockchain analysis techniques to track down the source of mixed coins. This is a big risk for a mixing service which should offer a high grade of privacy.

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

I have given merit to your account since I'm been also using cryptomixer for a long time and I have notice the same specially the second attack vector.

I would love to see it being implement a delay of -/+ 10 minutes will be OK I guess on my end.

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

These improvements sound reasonable. We are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. Thank you for your feedback!

Thank you for your fast reply. I hope that we can see this implemented in the future release of cryptomixer and more power to you guys.

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PrivacyImportant
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February 21, 2018, 12:16:15 PM
 #267

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

These improvements sound reasonable. We are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. Thank you for your feedback!

It would be nice to see these improvements implemented as fast as possible so that anybody using your service receives a far better privacy. Can I somehow speed up this process by helping to implement those changes or send you some financial support?

PS: Sadly I can't send you private messages because of my Newbie status. If you are interested then leave me a private message with some contact information. Thank you!
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March 10, 2018, 12:00:54 PM
 #268

Sad to see that still nothing has changed. I don't want to overexagerate but as long as this hasn't been fixed the whole mixing is useless and easily traceable even with open source blockchain analysis tools like BlockSci. And I am sure there exist even more powerful proprietary tools of services like Chainalysis and Elliptic which are already used to trace transactions of mixing services. When a service which pretends to offer privacy is shown that their privacy model is utterly broken one should at least hope that this problem is fixed asap.
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March 11, 2018, 11:40:11 AM
 #269

Sad to see that still nothing has changed. I don't want to overexagerate but as long as this hasn't been fixed

Sorry for the late response. I was sure, I have answered your last message.
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March 11, 2018, 11:41:25 AM
 #270

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

These improvements sound reasonable. We are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. Thank you for your feedback!

It would be nice to see these improvements implemented as fast as possible so that anybody using your service receives a far better privacy. Can I somehow speed up this process by helping to implement those changes or send you some financial support?


We are working on improvements that will cover your risk cases. We will roll out this update together with SegWit support.

Your help will be highly appreciated during the production tests. I'll contact you directly as soon as we would be ready. Thank you
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March 11, 2018, 11:51:28 AM
 #271

Sounds great, especially the SegWit support, but could you already estimate when this update will roll out (days, weeks, months)?
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March 13, 2018, 12:02:55 PM
 #272

Sounds great, especially the SegWit support, but could you already estimate when this update will roll out (days, weeks, months)?

We expect to deliver this update before Apr, 3.
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March 18, 2018, 09:29:20 PM
 #273

Hello! I am available for franch and Arabic translation .Whether you need it please contact me on telegram @backobtc thank you  I'm waiting for your response
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March 19, 2018, 01:09:27 PM
 #274

I am using your service for a long time now and I am very satisfied with it. But lately I have been investigating possibilities to track transactions which were send over mixing services and I found two possible attack vectors to cluster transactions which were mixed with your service.

The first one is less effective but there is still a decent risk. The transaction fees of your service are constant when the transaction has the same size. For example three transactions with one input and two output addresses had the same size of 42.598 sat/B. Obviously the fees vary when there are more input addresses but most of the time I received transactions with one input two output and the fees were constant.

The second is more severe. Let's say we have a setup of x-forward addresses and all of them are differently delayed in time. Normally you should think that this setup is bullet proof but it isn't. As the delay steps in your service are hour based and your service is sending the transactions at exactly the same time just hourly shifted (for example: 01-01 21:10:21, 01-01 14:12:20, 01-01 03:12:18) it is easy to cluster all transactions which are connected to one mixing step. With the help of the first attack vector the analysis becomes even more effective.

With the help of those information it should be no big deal for future blockchain analysis techniques to track down the source of mixed coins. This is a big risk for a mixing service which should offer a high grade of privacy.

My advice to improve the privacy of your service would be:
First attack vector: Add a small randomly chosen amount to your transaction fee. This hides the fact that a transaction is send by the same service/wallet.
Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.

You raised an important topic. All services provided by a cryptomixer were not anonymous all this time. I think that the cryptomixer is compromised. All this time they did not make the transaction anonymous, but just took a commission for false anonymity!
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March 20, 2018, 07:06:48 PM
 #275

You raised an important topic. All services provided by a cryptomixer were not anonymous all this time. I think that the cryptomixer is compromised. All this time they did not make the transaction anonymous, but just took a commission for false anonymity!

Don't let the fact, that we are implementing the proposed measures confuse you. Cryptomixer offers ones the most advanced and secure mixing algorithms. As I already said we are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. We are building the Cryptomixer with inputs from the forum community to make transactions safer and untraceable while contributing towards privacy over internet transactions. The improvements proposed by "PivacyImportant" member will really bring even more security to Cryptomixer in certain cases.
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March 21, 2018, 07:24:07 AM
 #276

You raised an important topic. All services provided by a cryptomixer were not anonymous all this time. I think that the cryptomixer is compromised. All this time they did not make the transaction anonymous, but just took a commission for false anonymity!

Don't let the fact, that we are implementing the proposed measures confuse you. Cryptomixer offers ones the most advanced and secure mixing algorithms. As I already said we are constantly improving our algorithms and believe there is never too many measures when you deal with security and privacy. We are building the Cryptomixer with inputs from the forum community to make transactions safer and untraceable while contributing towards privacy over internet transactions. The improvements proposed by "PivacyImportant" member will really bring even more security to Cryptomixer in certain cases.

You have to admit that at the moment your mixer does not meet the high requirements for anonymity.
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March 21, 2018, 11:51:06 AM
Last edit: March 21, 2018, 12:03:16 PM by cryptomixerscam
 #277

CRYPTOMIXER - UNRELIABLE! STOP USING IT! SERVICE COMPROMISED!

LIST OF ALL OUTCOMING ADDRESSES FOR THE LAST MONTH:

https://justpaste.it/1ik93


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March 21, 2018, 06:43:31 PM
Last edit: March 21, 2018, 07:40:28 PM by CryptoMixer.io
 #278

CRYPTOMIXER - UNRELIABLE! STOP USING IT! SERVICE COMPROMISED!

LIST OF ALL OUTCOMING ADDRESSES FOR THE LAST MONTH:

https://...

What is this? Smiley We do respect our competitors and ask for the same. Don't confuse forum members with this

Anyway, we used to treat security issues with all respect. If you believe that you have any security-related issue, kindly contact support. Thank you
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March 25, 2018, 05:15:36 AM
 #279

What is this? Smiley
Hello! It seems to be real list of outgoing addresses of your service. I did use your services last month and found my addresses in this list. If last poster tried to confuse some of your customers he succeed at least in my case.

Do you use single key for all your outgoing addresses permanently? How did he found them all? I find all this case disturbing.
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March 25, 2018, 05:35:09 AM
 #280

Second attack vector: Offer the functionality of choosing the delay on minute basis OR add a randomly chosen delay (for example +- 10 minutes from the chosen hourly delay) to your transaction time.
I do not think this will resolve issue. Does it matter that repayment delay step is hour or minute or second? It does not. Every repayment delay should be modified with absolutely random "time noise" which would be hard to quantize.
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