Ethereum Privacy Tokens Explained: What pERC-20 Means for Your Crypto
Did you know that every Ethereum transaction you make is visible to anyone with an internet connection? Your wallet balance, who you sent funds to, and how much you transferred are all public information. That’s about to change. Ethereum developers are proposing a new token standard called pERC-20 that would allow users to hold and transfer tokens without publicly revealing their balances or transaction details. This marks a major shift in how privacy is being discussed in crypto. This guide explains what pERC-20 is, how it works, why it matters for everyday users, and what the future of privacy on Ethereum might look like.
Read time: 8-10 minutes
Understanding Privacy Tokens for Beginners
Privacy tokens are cryptocurrencies that hide transaction details—like sender, receiver, and amount—from public view. Think of them like a private bank transfer versus writing your financial statement on a billboard for everyone to see. Today’s standard ERC-20 tokens on Ethereum work like that billboard: anyone can look up your wallet address and see exactly how many tokens you hold, where they came from, and where they went.
Why were privacy tokens created? The original vision of cryptocurrency included the promise of financial privacy. Satoshi Nakamoto’s Bitcoin whitepaper described a system where transactions would be pseudonymous, but not truly private. Over time, researchers realized that blockchain analysis could trace transactions and link identities to wallets. Privacy tokens solve this problem by encrypting sensitive data while still allowing the network to verify that transactions are valid.
A real-world example is Zcash (ZEC), which uses advanced cryptography called zero-knowledge proofs to shield transaction details. The new pERC-20 proposal brings similar privacy features directly to Ethereum’s most widely used token standard.
The Technical Details: How pERC-20 Actually Works
The pERC-20 proposal changes how tokens operate on Ethereum at a fundamental level. Here’s how it works:
1. Encrypted Notes Instead of Balances: Instead of storing token balances in a public ledger, pERC-20 tokens exist as encrypted cryptographic “notes”—similar to digital cash. Each note represents ownership of a specific amount.
2. Zero-Knowledge Proofs: When you send a pERC-20 token, the network doesn’t see the amount or recipient. Instead, it verifies a zero-knowledge proof—a mathematical proof that the transaction is valid without revealing any details.
3. Public Supply Verification: The total supply of a pERC-20 token remains publicly visible. This prevents the creation of new tokens out of thin air while keeping individual transactions private.
4. Compliance Mechanism: The proposal includes a cryptographic blacklist feature. Issuers can freeze specific notes if needed, without exposing ordinary users’ balances or transaction histories.
Why this structure matters for you: This design balances privacy with regulatory compliance. You get financial privacy, but the system still prevents abuse like money laundering or unauthorized token creation.
Current Market Context: Why Privacy Matters Now
Privacy in crypto has had a complicated journey. After the US Treasury sanctioned Tornado Cash—a popular privacy tool—in 2022, many developers and users became wary of privacy-focused projects. Regulators worldwide began scrutinizing privacy coins and mixing services.
But the landscape is shifting. As of mid-2026, several developments signal a privacy renaissance:
- pERC-20 Proposal: The first major Ethereum token standard focused specifically on privacy. If adopted, it could become the default way to issue private tokens on Ethereum.
- STRK20 from Starknet: Launched on Starknet’s layer-2 network, this framework extends privacy beyond simple transfers to DeFi applications like lending, staking, and swapping.
- Institutional Interest: Financial institutions want privacy features for business transactions. Public blockchains expose competitive information that companies would rather keep confidential.
According to Eli Ben-Sasson, co-founder of StarkWare, the biggest challenge isn’t cryptography—it’s user experience. “If the UX is bad, very few users will use it. If very few users use it, they don’t get much anonymity,” he told CoinDesk.
Competitive Landscape: How Privacy Solutions Compare
Here’s how the main privacy solutions stack up:
| Feature | pERC-20 (Ethereum) | STRK20 (Starknet) | Zcash |
|---|---|---|---|
| Network | Ethereum mainnet | Starknet (Ethereum L2) | Dedicated blockchain |
| Scope | Token transfers only | Full DeFi (lending, swaps, staking) | Native asset transfers |
| Compliance Features | Built-in blacklist mechanism | Under development | Optional shielded pool |
| User Experience | In development, goal is simple | More complex but supports DeFi | Historically difficult |
| Post-Quantum Security | Not specified | Yes, uses post-quantum encryption | Not yet |
Why this matters for users: The choice isn’t just about which is “better”—it’s about what you want to do. pERC-20 is simpler for basic token transfers. STRK20 is more ambitious, aiming to bring privacy to the entire DeFi ecosystem. Zcash remains the gold standard for pure privacy but has limited ecosystem support.
Practical Applications: Real-World Use Cases
Here are the key use cases for privacy tokens like pERC-20:
- Private Payments: Send funds to family or friends without revealing your financial situation. This benefits anyone who values personal financial privacy.
- Business Transactions: Companies can pay suppliers or employees without exposing their cash flow, vendor relationships, or salary structures to competitors.
- DeFi Privacy: With frameworks like STRK20, users can lend, borrow, and swap tokens confidentially. This prevents front-running and protects trading strategies.
- Compliant Privacy: Institutions can use privacy features while maintaining compliance through built-in mechanisms like cryptographic blacklists.
- Cross-Border Transfers: Individuals in countries with unstable currencies can move funds privately without government surveillance.
Risk Analysis: Expert Perspective
Privacy tokens come with important risks to consider:
Primary Risks:
1. Regulatory Scrutiny: Governments may view privacy tokens as tools for money laundering or tax evasion. The Tornado Cash sanctions show regulators are willing to take action.
2. Adoption Challenges: Privacy networks require large user bases to provide meaningful anonymity. If only a few hundred people use pERC-20, it becomes easy to identify participants.
3. Technical Complexity: If user experience isn’t smooth, people won’t use it—defeating the purpose. Bad UX also means fewer users, which means less anonymity.
Mitigation Strategies:
- The compliance mechanisms in pERC-20 are specifically designed to address regulatory concerns while preserving privacy.
- Projects like STRK20 are investing heavily in user experience improvements.
- Privacy systems work best when integrated into existing popular wallets and dApps.
Expert Consensus: Most developers agree that privacy is essential for crypto’s long-term viability, but it must be implemented responsibly. The balance between privacy and compliance will define the next wave of innovation.
Beginner’s Corner: What to Watch For
If you’re interested in privacy tokens, here’s your quick action plan:
1. Stay Informed: Follow the pERC-20 proposal through its review process. It’s an Ethereum Improvement Proposal (EIP) that must go through community review before adoption.
2. Evaluate Your Needs: Consider whether you need privacy for basic transfers or DeFi activities. Different solutions serve different purposes.
3. Learn About Zero-Knowledge Proofs: This is the technology behind most privacy solutions. Understanding it helps you evaluate claims and risks.
4. Wait for Mainstream Adoption: Early privacy tools often have bugs and poor UX. Let larger wallets and exchanges integrate support first.
Common Mistake to Avoid: Don’t assume that all privacy tokens are created equal. Each has different trade-offs between privacy, compliance, and usability. Research before using.
Future Outlook: What’s Next
Privacy is returning to the center of Ethereum development. Here’s what to expect:
- pERC-20 Review Process: The proposal must go through the lengthy Ethereum Improvement Proposal process. It could take months or years to gain adoption.
- PRIVACy-First DeFi: Starknet’s STRK20 is just the beginning. Expect more layer-2 networks to add privacy features to their DeFi suites.
- Post-Quantum Preparation: As quantum computing advances, privacy protocols are beginning to incorporate post-quantum security measures.
- Regulatory Frameworks: Countries like the EU (under MiCA) and US (through various bills) are developing frameworks that privacy tokens must comply with.
The era of completely transparent blockchains may be ending. pERC-20 and similar proposals suggest that privacy—not public transparency—could become the default for Ethereum users.
Key Takeaways
- pERC-20 is a proposed Ethereum token standard that hides balances, transaction amounts, and counterparties while keeping total supply publicly verifiable.
- Privacy in crypto is making a comeback after years of regulatory scrutiny, with new proposals balancing confidentiality and compliance.
- User experience is the biggest obstacle—privacy tools must be easy to use to build the large user bases needed for effective anonymity.
- Different solutions serve different needs: pERC-20 focuses on transfers, while STRK20 extends privacy to the entire DeFi ecosystem.