Vitalik Buterin, co-founder of Ethereum, announced new efforts that will provide privacy built into the network. These three technical initiatives, launched to meet increasing demands against privacy and quantum attacks, are expected to provide new capabilities while preserving Ethereum’s decentralization.
Privacy work built into Ethereum
Vitalik Buterin emphasized three main solutions that accelerate the privacy-focused development of the Ethereum ecosystem: account abstraction and the FOCIL mechanism, a new proposal called “keyed nonces” and innovations in the access layer.
FOCIL (Fork-Choice Enforced Inclusion Lists) makes it harder to block private transactions on the core network, allowing privacy-oriented transfers to be included more easily. “Keyed nonces” solve security and privacy issues in how transactions are recorded and sorted on the network. At the access layer, the project called Kohaku and its secret reading capabilities reduce the risks of data leakage that may occur when wallets query blockchain data.
Mini dictionary: Account Abstraction: It is a technical solution that makes the core functions in a blockchain wallet more flexible and programmable, thus improving the user experience and providing new methods of identity and security.
Vitalik Buterin outlined three steps to transform Ethereum to provide built-in privacy in the short term: Account abstraction and stronger inclusion of privacy protocols with FOCIL, the “keyed nonces” proposal, and private readability at the access layer with projects like Kohaku.
“Keyed nonces”, which will cause a critical change in the functioning of Ethereum, isolate each transaction against replay within a different area with EIP-8250, ensuring that transactions originating from the same account but with different contexts cannot be linked together. It was highlighted that the system could manage 500 billion privacy data without loss in eight years.
Privacy and transaction costs debate
Privacy protocols have progressed to date with various limitations. In particular, solutions such as Privacy Pools and Railgun required external intermediaries (relayers) during the transaction sending phase, which created additional fees and security risks. With account abstraction and FOCIL, this requirement is eliminated, thus improving confidential transactions in terms of both cost and security.
Buterin’s nine-step road map, announced in April 2025, included important goals such as limiting wallets to one address for each application, encryption-based privacy in RPC requests, and performing multiple on-chain privacy transactions with a single verification.
In his assessment on the same day, crypto analyst MilliΞ predicted that built-in privacy functions would allow Ethereum to gain a real “money” function and could lead to increased transaction fees on the main network.
Integrated approach with quantum resistivity
It was announced that Ethereum has developed new security measures against quantum attacks simultaneously with its privacy solutions. The Ethereum Foundation stated that it is making preparations for quantum-resistant cryptography in verification signatures, data access commitments, account signatures, and zero-knowledge proofs at the application layer.
It is emphasized that the quantum resistant structure directly coincides with the developments in the field of privacy. In particular, account abstraction plays an important role in both areas. With the EIP-8141 proposal, it is expected that each account will be able to switch to its own quantum secure signature scheme in the Hegotá hard fork, which will be held in the second half of 2026.
Ethereum Foundation’s quantum security team, founded in January 2026; It plans to make its blockchain core infrastructure ready for the quantum age in the coming years, with a target of 2029.
| Solution | Aim |
|---|---|
| FOCIL | Making it harder to block private transactions and prevent censorship of block producers |
| Keyed nonces | Preventing transaction duplication and connection problems, increasing privacy |
| Kohaku and the access layer | Preventing data leakage in wallet queries |
