x21.tools

self sovereign tools

Coinjoin

Seperating Your Bitcoin From Its Past

The Bitcoin blockchain is completely public, anyone can hop onto a block explorer and look up any transaction from the last hour or the last 10 years. Depending on the tools available and their level of expertise they could analyse and follow any one of these transactions to build up a picture of an entity’s spending habits. Chain surveillance firms do exactly this, and using heuristics (assumptions) they can cluster transactions together to follow a given entity accross the chain. Aside from this being an invasion of your privacy it also poses the risks we covered in sourcing your bitcoin. Coinjoin is a privacy tool that prevents this and there are different types of implementations, each with their own take on the same basic idea. Two or more users pool their UTXOs together into a collaborative transaction that is formed in a unique way. The way the transaction is constructed makes it very difficult for surveillance firms to know exactly which transaction output belongs to which of the input owners...

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Whirlpool + Postmix Spending FAQ

Whirlpool is a zerolink coinjoin implementation created by the Samourai Wallet developer team. It is the most structurally sound and easy to use implementation on the market today. Whirlpool breaks all deterministic links between inputs and outputs and provides the user with market leading postmix spending tools to allow for proper spend hygiene after mixing...

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Whirlpool Anonymity Sets

There has been much confusion recently around Anonymity Sets in relation to CoinJoin transactions. While there is no universally agreed upon definition, the generally agreed upon concept is, the size of the crowd, that your mixed UTXOs can hide in...

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KYCP (Know Your Coin Privacy)

KYCP is an online tool for users of Bitcoin to visualize the degree of privacy in a bitcoin transaction. Various metrics are used to quantify this including measuring the resistance of a transaction against privacy attacks such as Merged Inputs Heuristics and Coinjoin Sodoku. These metrics make it especially useful for determining the quality of joint transactions such as CoinJoins...

How to Use the KYCP Online Tool

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Make Every Spend A Coinjoin

Meeting place for Cahoots spenders and collaborators to hook up and coordinate for transacting over Soroban...

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{Resources}

An Intro To Samourai Wallet (Whirlpool)

Bit Buy Bit EP43 with BitcoinQ+A (Coinjoin)

Using Whirlpool Coinjoin in Sparrow Wallet

Coinjoin with Sparrow Wallet feat Diverter_NoKYC

Mixing with Whirlpool (Sparrow Wallet)

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