A newly proposed standard called pERC 20 in the Ethereum ecosystem is taking aim at a key issue: enabling users to hold and transfer tokens without exposing their balances, transaction detail
A newly proposed standard called pERC 20 in the Ethereum ecosystem is taking aim at a key issue: enabling users to hold and transfer tokens without exposing their balances, transaction details, or counterparties to the public. This initiative has reignited debate about whether all financial activity should be instantly visible on public blockchains by default.
Currently, Ethereum’s widely used ERC 20 standard makes token balances and transaction histories fully transparent, allowing anyone to track funds on the blockchain. In sharp contrast, the pERC 20 model is designed to keep sensitive information confidential. Under this framework, tokens would be managed as encrypted cryptographic notes, closely mirroring the privacy of physical cash.
Mini glossary: pERC 20 is a proposed token standard that aims to add a privacy layer to Ethereum’s ERC 20 system. While transaction details remain hidden under this model, network validation is achieved through cryptographic techniques.
Right now, most Ethereum tokens act much like public bank accounts—anyone can view which assets are held, their origins, and destinations via a wallet address. With the pERC 20 proposal, background details would remain private, yet the network could still verify that transaction records have not been tampered with, maintaining data integrity.
The system under discussion is based on ensuring that data remain unchanged, even as transactions themselves are kept private.
Importantly, the proposal does not render all data invisible. The total token supply would remain publicly accessible, allowing external verification to prevent the covert creation of new tokens. A compliance mechanism is included, permitting issuers to freeze specific cryptographic notes if necessary. This aims to enable certain interventions without disclosing the complete histories or balances of everyday users.
This approach raises significant questions about how privacy-centric payment systems might coexist with regulatory demands. At the heart of the discussion is how to protect user privacy without rendering the blockchain unverifiable or immune to oversight.
Some developers argue that the problem extends beyond private payments alone. For the system to reach mainstream adoption, it must offer a strong and intuitive user experience. If privacy tools are clunky or difficult to use, a limited user base could undermine the very anonymity the platform hopes to deliver.
Ben Sasson emphasized that if user experience is poor, only a handful of people will use the system, and when the adoption is narrow, the promised anonymity fundamentally weakens.
One standout aspect of the proposal is its reliance on post-quantum secure cryptography. This feature could become increasingly critical as blockchain developers prepare for advances in quantum computing, which may someday threaten current encryption techniques. The lively debate itself signals how privacy perspectives on public blockchains may be poised for a significant shift.
The proposal has also sparked industry-wide interest in how privacy technologies can be scaled responsibly and remain compatible with regulatory compliance. As blockchain matures, these challenges are likely to be at the forefront of technical innovation and industry policy.
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