Ethereum Foundation: Launches Universal Ethereum Signer App on Passport Prime

According to Crypto Briefing, the Ethereum Foundation is launching an application called Universal Ethereum Signer on the Passport Prime hardware device from Foundation, running on its KeyOS operating system. The application was developed by Nicolas Bacca, co-founder of Ledger and current CEO of ZKnox, with funding from the Ethereum Foundation, and is currently in the testing phase.

This application allows users to securely review and sign Ethereum transactions on isolated hardware without having to expose their private keys to their mobile phones or computers. For Passport Prime users, this is the first time the device can act as a dedicated signer for Ethereum transactions through a third-party application. Currently, users need to manually sideload the signing application onto Passport Prime. Foundation CEO Zach Herbert stated that a future application directory will allow trusted groups to push updates directly to users, expected to launch in the winter of 2026.