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Questions tagged [coinjoin]

Coinjoin allows people to combine their transactions with random other people to increase privacy.

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2answers
22 views

Single “Multiple Inputs Tx” vs Multiple “Single Input Tx”

Alice owns three addresses A1, A2, A3. She decides to collect the coins held by these addresses into a single coin so she generates a fresh new address A4 for that. She has the following two options: ...
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2answers
200 views

What is the maximum anonimity set of a CoinJoin transaction?

I found the only limiting factor is the maximum standard transaction size which is 100k bytes. The most common transactions we are concerned with are 1 input, 2 outputs and the second most common are ...
1
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1answer
87 views

How does CoinJoin affect the total transaction size?

As I understand it, CoinJoin is a method to aggregate multiple transactions into a single transaction, mostly for privacy purposes. How does this aggregation affect the total size of the transactions?...
1
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0answers
15 views

alone in a CoinJoin amongst colluding scoundrels- can they spot you?

What if you participate in a CoinJoin and all the other actors that you're exchanging with are colluding against you, or controlled by the same person. I guess in this scenario if they wanted they ...
4
votes
1answer
261 views

Would quantum computing be able to deanonymize CoinJoin transactions?

Using the worst case scenario of this question, namely: Bitcoin ECDSA algorithm would be broken. Because quantum computers can easily decrypt the private key using the public key, anyone with a ...
0
votes
1answer
151 views

What is the cheapest fee based bitcoin / altcoin mixing service to keep myself anonymous and from being tracked?

I purchased some bitcoins from Coinbase and I want to give them away to friends for their birthday this year, but what I'm afraid of is if they end up buying stuff on the dark web with it. Last thing ...
4
votes
1answer
470 views

What is the difference from coinjoin and a coinshuffle transaction?

Coinjoin and coinshuffle creates an anonymous transaction. But how are they different? And which services implemented these features?
7
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1answer
123 views

What SIGHASH flags does CoinJoin use?

What SIGHASH flags are used when constructing a CoinJoin transaction?
5
votes
1answer
296 views

How does Dash achieve anonymity without centralisation?

Dash is supposedly completely anonymous. How does this work without any centralisation? Is there one person with all the transactions and only they mine?
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0answers
94 views

How do coinjoin and sharedcoin work? How to make it make it hard to pinpoint bitcoin sender wallet [duplicate]

I would like to implement a way for bitcoin transactions to be untraceable. EX. user1 on my site wants to send bitcoins to user2. How would I go about mixing the coins so user2 doesn't get user1's ...
5
votes
1answer
736 views

Can Darkcoin's Darksend be implemented on top of Bitcoin?

Can Darkcoin's Darksend (I think this is called coinjoin, but I am unsure) be implemented on any cryptocurrency (without a fork), or must the feature be present when the coin is first released?
9
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4answers
2k views

Explain how CoinJoin enhances anonymity, in plain English?

I just learned about CoinJoin, but I don't really understand all the jargon being thrown around. Can someone explain how this works where a 10-year-old can understand?