Why the Ethereum Foundation Is Launching a Signing App on Passport Prime

In this episode of Unchained Premium, Zach Herbert, co-founder and CEO of Foundation, joined Laura to talk about the Ethereum Foundation’s new Universal Ethereum Signer app, built by Ledger co-founder Nicolas Bacca, which runs on Foundation’s KeyOS operating system and Passport Prime device.

The conversation covers why Herbert calls Foundation’s signing devices “human authority hardware,” how KeyOS gives each app a hardened child key instead of the master seed, and why a 9,000-line microkernel is easier to audit than the Linux kernel’s 40 million lines. Herbert also walks through Magic Backups, which split a seed into three Shamir shares across two NFC cards and a phone, and why Foundation manufactures in an ITAR-certified US facility.

With more people suggesting a dedicated iPhone instead of a hardware wallet, why does Herbert think a $349 device is worth it? Listen to find out!

Show Highlights:

• Why Foundation calls signers “human authority hardware”
• How users will sideload the Ethereum Foundation’s Universal Ethereum Signer onto KeyOS during the beta
• Why each KeyOS app gets a hardened child key rather than access to the master seed
• How a roughly 9,000-line microkernel compares with the Linux kernel’s 40 million lines, and Foundation’s plan for formal verification
• How Magic Backups split a seed into three Shamir shares and restore encrypted device data with no email or username on file
• Why Foundation builds Passport Prime in an ITAR-certified US facility with active anti-tamper switches
• How the coming App Catalog will let trusted developers push updates directly, similar to F-Droid on GrapheneOS
• Why Herbert wants Passport to be a neutral platform rather than a companion app built around swap and on-ramp fees

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