Railgun, a privacy protocol, has developed a prototype for a private multi-signature wallet on Ethereum, addressing a call from Ethereum co-founder Vitalik Buterin for enhanced privacy solutions. The new wallet utilizes zero-knowledge proofs and a method known as FROST, marking a first for Ethereum. This development comes after Buterin pointed out the lack of multi-signature support in privacy protocols at a recent event in Tokyo. Railgun plans to showcase the wallet at the upcoming Devconnect Argentina conference in Buenos Aires next month.