Privacy Protection in Cryptocurrency: Options After Mixer Sanctions
Have you ever checked your wallet history on-chain? Where a transfer came from, where it went, and who it passed through in between—all of it is publicly verifiable.
For many people, this doesn't matter—after all, addresses are anonymous, and no one knows who is behind them. But the problem is, once your address is linked to a real identity (for example, by withdrawing coins from an exchange that requires KYC), all your on-chain activities become tied to your identity. Someone is watching you.
In the past few years, mixers have been the tool to solve this problem. You deposit your coins, they get mixed with others' coins, and then returned, severing the original transaction link. But after Tornado Cash was sanctioned in 2022, this path was essentially blocked. This article will help you sort things out: the current state of mixers, what alternatives exist, and how ordinary people should choose.
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Current State of Mixers: Tornado Cash Sanctioned, the Entire Sector Nearly Paralyzed
First, let's recap what happened.
In August 2022, the U.S. Treasury Department's Office of Foreign Assets Control (OFAC) added Tornado Cash to the sanctions list. This was the most impactful enforcement action in the history of global mixer regulation. Subsequently, its founder was arrested and faces criminal charges. After the sanctions, Tornado Cash's deposit volume dropped by 71.03%.
The direct consequences of the sanctions went beyond Tornado Cash itself. Major RPC service providers (Infura, Alchemy) blocked interactions with Tornado Cash contracts, and most major DEX and DApp frontends imposed additional scrutiny on addresses associated with mixers. More critically, major centralized exchanges (CEX) would refuse to accept or freeze accounts receiving funds from known mixer addresses. Coins you've washed through a mixer might not be able to enter an exchange.
Did illegal funds stop? No. A University of Cambridge study found that the sanctions primarily deterred compliant users, while illicit actors adapted—initially turning to alternative mixers, and later to cross-chain bridges and decentralized exchanges. Meanwhile, Tornado Cash's smart contracts cannot be shut down—as long as the Ethereum network is running, they continue to operate. In fact, attackers still rely on Tornado Cash in 78.33% of Ethereum-related security incidents.
In May 2026, the U.S. Treasury officially removed Tornado Cash from the global blacklist. However, the criminal trial of founder Roman Storm is still ongoing, expected in October 2026. The sanctions are lifted, but the legal risks remain.
Alternative 1: Privacy Coins—Monero and Zcash, Two Approaches
If what you want is "transactions that are inherently invisible," privacy coins are another direction.
Monero (XMR) takes a mandatory privacy route—every transaction hides the sender, receiver, and amount by default. Its privacy design is not optional but a default setting. As of February 2026, the entire privacy coin market was about $3.2 billion, with Monero accounting for $2.8 billion. In January 2026, Monero briefly hit an all-time high of $798.
Zcash (ZEC) takes an optional privacy route—users can choose public transactions or "shielded transactions." As of March 2026, shielded transactions accounted for 86.5% of Zcash network activity. However, Zcash has also revealed problems: in June 2026, a vulnerability was discovered in its Orchard privacy pool that could potentially allow attackers to create fake ZEC tokens. The same month, on-chain analytics firm Arkham claimed to have successfully traced $420 billion in Zcash transactions, questioning its privacy.
Regulators are not friendly to privacy coins. In June 2026, the Philippine central bank banned licensed exchanges from trading privacy coins, including Monero and Zcash. The EU's DAC8 regulation took effect on January 1, 2026, requiring crypto service providers to implement strict transaction monitoring.
For ordinary users, using privacy coins presents two practical problems: first, many mainstream exchanges have delisted or restricted trading in privacy coins; second, if you need to exchange privacy coins for fiat or stablecoins, compliant channels are becoming increasingly narrow.
Alternative 2: Stealth Addresses—Protocol-Level Privacy, Low Compliance Risk
Stealth addresses are completely different from mixers. Mixers pool money together and then distribute it; stealth addresses change how addresses are generated—the sender calculates a one-time address based on the receiver's public "meta-address," funds are sent to this one-time address, and only the receiver knows it belongs to them.
From the outside, these one-time addresses have no visible connection to each other. Moreover, there is no "mixing" action, making it less likely to be characterized as a money laundering tool compared to mixers.
Ethereum's progress in this area is ERC-5564 (Stealth Address Standard), co-authored by Vitalik Buterin. The accompanying ERC-6538 (Stealth Meta-Address Registry) is also advancing.
However, stealth addresses are still in their early stages. Wallet support is not widespread, and the operational process is relatively complex. The sender needs to actively use your meta-address to calculate a one-time address, and the receiver needs to periodically scan the on-chain notification registry to identify funds belonging to them. For ordinary users, the barrier to entry is not low.
Alternative 3: CoinJoin—Bitcoin's Collaborative Privacy
CoinJoin is the most mainstream privacy solution in the Bitcoin ecosystem. The principle is simple: multiple people combine their Bitcoin inputs into a single transaction and then distribute equal outputs, making it impossible for an external observer to determine which output corresponds to which input.
Since 2018, CoinJoin implementations have mixed over 391,000 Bitcoins.
But CoinJoin suffered a major blow in 2024. The coordinator for Wasabi Wallet shut down in mid-2024 under regulatory pressure. Samourai Whirlpool went offline in April 2024, and its founders were indicted by the U.S. Department of Justice for money laundering conspiracy.
As of 2026, two main decentralized options remain:
- JoinMarket: Peer-to-peer coordination, no centralized operator
- Joinstr: A new variant based on the Nostr protocol
The problem with CoinJoin is that participating in CoinJoin itself is public. Observers know you participated in mixing, just not which output is yours. Some custodians consider CoinJoined coins as "tainted."
Alternative 4: Zero-Knowledge Proof Privacy Protocols—New Directions like Railgun
If the previous options each have their shortcomings, privacy protocols driven by zero-knowledge proofs (ZKP) represent another technological direction.
Railgun is a representative privacy protocol on EVM chains currently. Unlike the "deposit, withdraw" mixing model of Tornado Cash, Railgun uses a "private account model"—users deposit assets into Railgun's Private Balance via a Shield operation, using zk-SNARK proofs to complete anonymous transfers or private DeFi operations. Users can maintain a private account state long-term without needing to frequently exit the privacy system. The protocol charges a 0.25% fee on all transactions involving Shield or Unshield.
There are also several noteworthy new developments in 2026. Starknet launched the STRK20 zero-knowledge privacy framework, supporting shielded balances and private transfers for any ERC20 asset on the network, while incorporating built-in compliance disclosure mechanisms. Unlike traditional mixers, STRK20 embeds privacy shielding directly into the asset transfer process, making privacy a native transaction mode.
How should an ordinary user choose?
Below is a comparison of several mainstream options:
| Option | Privacy Level | Compliance Risk | Ease of Use | Use Case |
| Traditional Mixer (Tornado Cash, etc.) | High | Very High, Sanctioned | Medium | Not Recommended |
| Privacy Coin (Monero) | Highest | High, Exchanges Delisting | Low | Need Complete Anonymity |
| Privacy Coin (Zcash) | Medium-High (Optional) | Medium-High | Low | Balance Compliance & Privacy |
| Stealth Address (ERC-5564) | Medium-High | Low | Medium-High | Receiver-Side Privacy |
| CoinJoin (JoinMarket) | Medium | Medium | Medium-High | Bitcoin Holders |
| ZK Privacy Protocol (Railgun) | High | Medium | Medium | DeFi Privacy Interactions |
If you only occasionally need a bit of on-chain privacy, stealth addresses are the most compliant direction, although they are not very convenient to use yet. ERC-5564 is gradually being integrated into wallets and protocols, and it will become easier to use in the future.
If you are a long-term Bitcoin holder, JoinMarket is currently the most decentralized CoinJoin option. No centralized operator means no single point of failure risk, but the operational complexity is significantly higher than one-click solutions like Wasabi.
If you need to participate in DeFi while protecting privacy, ZK privacy protocols like Railgun are worth watching. They allow you to continue using the existing DeFi ecosystem while maintaining privacy.
Regarding privacy coins, Monero offers the most thorough privacy protection but faces the greatest regulatory pressure. Zcash provides a compromise between compliance and privacy, but recent vulnerabilities and privacy concerns have dented its credibility.
It's important to note: None of the above options guarantee 100% anonymity. On-chain analytics companies are continuously improving their tracking algorithms. A University of Cambridge study pointed out that typical criminal money paths in 2026 involve three to five different obfuscation steps. For ordinary users, the goal should be "sufficient privacy," not "absolute anonymity."
More importantly, compliance risks vary by region. Using Tornado Cash in the U.S. is still considered high-risk behavior; under the EU MiCA framework, VASPs monitor mixer addresses; the UK FCA considers mixer usage a red flag indicator for anti-money laundering. Before using any privacy tool in your area, it is advisable to understand local laws and regulations.
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There is no absolute privacy in the crypto world, but there are relative choices. Understanding the positioning and risks of each tool is far more important than blindly pursuing "anonymity."
FAQ
1. Can Tornado Cash still be used now? Yes, but there are risks.
Technically, Tornado Cash's smart contracts are still running. In May 2026, the U.S. Treasury removed it from the sanctions list. However, the criminal trial of founder Roman Storm is still ongoing, and funds using Tornado Cash may still be flagged or refused by exchanges.
2. What is the difference between privacy coins and mixers?
Mixers are an additional tool—you put coins in, it severs the transaction link, and returns them. Privacy coins have privacy built into the coin itself—every Monero transaction is anonymous by default. The former is "adding a layer of privacy to public coins," the latter is "the coin itself is private."
3. Which is better, stealth addresses or mixers?
Stealth addresses have lower compliance risk because there is no "mixing" action; they simply change how addresses are generated. However, they are still in early stages, with limited wallet support and higher operational barriers. Mixers offer stronger privacy effects but carry much higher legal risks.
4. Will using privacy tools get my exchange account banned?
It's possible. Major CEXs may refuse to accept or freeze funds from known mixer addresses. CoinJoined coins may also be considered "tainted" by some custodians. If you need to transfer coins back to an exchange, it's advisable to first confirm that exchange's stance on privacy tools.
5. What role do zero-knowledge proofs (ZKP) play in privacy protection?
ZKP allows you to prove something is true without revealing specific details. For example, you can prove "I have sufficient balance to complete this transfer" without revealing what the balance is. Tornado Cash, Zcash, and Railgun all use ZKP technology. By 2026, ZKP has moved from the lab to large-scale application.
