What are Bitcoin mixers (with examples)

TLDR;

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• Bitcoin mixers are tools that help hide the origin and destination of BTC funds by increasing the privacy of transactions

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• BTC mixers function by combining/mixing multiple transactions and then redistributing the BTC to users

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• Bitcoin mixers are also called Bitcoin Tumblers, and they can be centralized or decentralized

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• These privacy-enhancing tools raise legal questions due to their increased usage by criminals

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Bitcoin transactions are pseudonymous, not anonymous. This means that although the identity of entities moving funds using BTC is represented by an alphanumeric name (a BTC address), their actions can, with a little digging, be linked to an actual person. However, for some Bitcoin users, privacy is the reason they are in the crypto train. As such, they use third-party tools like Bitcoin mixers to hide the origin and destination of their funds. But what are Bitcoin mixers? How do they work? Is it legal to use a Bitcoin mixer?

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Let�s explore the world of Bitcoin mixers and cryptocurrency mixers in general. Ready? Let�s go.

What are Bitcoin mixers?

Bitcoin mixers or Bitcoin tumblers are third-party tools that increase the privacy of Bitcoin transactions by mixing multiple transactions. Bitcoin mixers obfuscate the identity of the parties involved in a BTC transaction. 

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They further enhance user privacy by not implementing Know Your Customer (KYC) checks, meaning they do not possess personally identifying details such as names, country of origin, address, and phone numbers of their users.

Types of Bitcoin mixers

Centralized Bitcoin mixers

Centralized Bitcoin mixers or custodial Bitcoin mixers require users to deposit their funds into the platform, temporarily giving the mixer ownership of the funds. They receive BTC and credit the depositor with different Bitcoin. They charge a small fee for their service.

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Custodial mixers are in the hands of third parties and offer multiple options, including enabling users to receive the �clean� BTC in various wallets.�

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These types of Bitcoin mixers are risky to use because their operators may decide to vanish with user funds.

Decentralized or non-custodial Bitcoin mixers

Decentralized Bitcoin mixers use smart contracts to mix deposited BTC. The user deposits BTC into the smart contract, then they withdraw it to a wallet of their choice after a certain time frame. Smart contract-based decentralized BTC mixers employ a service provider called relayers that settle transaction fees during the withdrawal process, further obfuscating the trail of funds.

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Another category of non-custodial Bitcoin mixers is CoinJoins. Unlike smart contract-based mixers that act as standalone platforms, CoinJoins are often baked inside privacy-focused wallets. CoinJoins join users' coins with those of other users into a single transaction.

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Some advantages of decentralized Bitcoin mixers is that they have lower risks since the platforms don�t �own� deposited funds, they are hard to shut down, and offer enhanced privacy.

Examples of popular Bitcoin mixers

• Whirlpool - Whirlpool is available either as a feature inside the privacy-focused Samourai wallet or a standalone application. The mixer uses the CoinJoin feature to obfusicate the origin of BTC.

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• Tumbler.io - This mixer uses CoinJoin and a host of other crypto mixing algorithms to provide better privacy of Bitcoin transactions.

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• UniJoin - It�s a decentralized Bitcoin mixer that employs the CoinJoin technology.

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• Wasabi Wallet - It�s a Bitcoin wallet with inbuilt CoinJoin support

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• Blender.io - This is an example of a centralized Bitcoin mixer

Are Bitcoin mixers legal?

Bitcoin mixers aren�t expressly illegal in most countries. However, some jurisdictions like the United States require crypto mixing service providers to register with the Financial Crimes Enforcement Network (FinCEN) as money transmitters.

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The need to hide the trail of crypto transactions using a mixer raises questions as to the legality of the funds. This leads law enforcement and financial regulators to view crypto mixer users as criminals.

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Where crypto and Bitcoin mixers fail to follow set guidelines or are suspected of facilitating movement of illicit funds, it may lead to server seizures, criminal charges, sanctions, or civil penalties. Bestmixer.io is an example of a BTC tumbler whose servers were confiscated by law enforcement.

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Bitcoin Fog and Blender.io are examples of crypto mixers that have faced criminal charges and sanctions, respectively. Tornado Cash is also another popular crypto mixer to be sanctioned by the United States Treasury. Coin Ninja, a crypto tumbler, faced civil penalties for operating without a license.

Who are the main users of Bitcoin mixers?

• Privacy-centric crypto users.

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• Whistleblowers, political activists, and individuals in oppressive governments.

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• Criminals attempting to �clean� illicit funds and or hide dark web transactions.

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• Entities looking to evade sanctions.

Alternatives to Bitcoin mixers

If Bitcoin mixers aren�t your favorite but you still want to conduct private and hard-to-track crypto transactions, you can use the chain-hopping technique. This technique involves moving Bitcoin across multiple blockchains. 

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This can be done by converting Bitcoin to other coins like Ethereum (ETH) and Tether (USDT). Although this method isn�t as privacy-centric as using a BTC tumbler, it complicates the trail of funds.

Conclusion

What are Bitcoin mixers? These are centralized (custodial) and decentralized (non-custodial) platforms that increase the privacy of Bitcoin transactions by mixing BTC from multiple users into a single transaction. Although they aren�t outrightly illegal in most jurisdictions, law enforcement and financial regulators consider them a haven for criminals.