Vitalik Buterin, co-founder of Ethereum, stated at the 12th Global Blockchain Summit on September 23, 2026, that traditional pseudonymity is no longer effective. He argued that modern AI can deanonymize users by analyzing metadata, such as transaction sizes, timestamps, and behavioral patterns.
In June 2026, an AI successfully identified Buterin's anonymous writings by analyzing his style. To counter such threats, Buterin proposes 'programmable privacy,' a framework allowing users to selectively disclose specific data, such as proving sufficient funds without revealing a total balance.
Buterin also suggested using mixnets to break connections between senders and receivers by routing data through multiple nodes. These mechanisms aim to make tracing transactions computationally impractical for AI-powered observers.
The Ethereum privacy roadmap, updated in August 2026, includes plans to integrate these protections at the protocol layer. Key components include keyed nonces to prevent replay attacks and account abstraction to enable custom verification logic for complex use cases.
