Vitalik Buterin publicly supported Railgun as a critical tool for achieving privacy in decentralized finance (DeFi), particularly through its integration of zero‑knowledge cryptography

Quotes that support claims

Railgun is a project that aims to make DeFi anonymous. His system is indeed based on ZK-SNARK (zero-knowledge succinct non-interactive arguments of knowledge), which is Vitalik’s preferred solution to elevate the privacy level of Ethereum.

Buterin has spoken about privacy in crypto many times before. He’s called it “normal” and believes people shouldn’t be tracked just for making transactions. Railgun is a protocol he’s mentioned in the past. It lets users send tokens while keeping their financial history private, but also uses certain checks to prevent abuse or bad actors from slipping in unnoticed.