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To prevent reliance on black-box chips, Zach Herbert explains Passport combines an internal avalanche noise source with multiple external entropy inputs. Thomas Susanka notes the Trezor Safe 7 mixes four separate entropy sources, including secure elements and the host computer.
Volunteer teams, including BTC Sessions and Rob Hamilton, provided extensive support to affected users, with BTC Sessions reporting efforts protected "tens of millions of dollars." Foundation Devices also assisted Coldcard users, highlighting a community-driven "immune system" approach to crisis.
Zach explains that Foundation's Passport devices are not affected, as they combine multiple entropy sources including an open-source avalanche noise source, avoiding reliance on black-box silicon.
Foundation Devices released Envoy 2.3.0 with a redesigned Sendflow, manual transaction rescan, address explorer, message signing, and a new transfer feature between accounts.
Foundation Devices released KeyOS 1.3 beta for Passport Prime, adding external Bitcoin seed import, BIP85 password generation, bulk import of 2FA codes from Google Authenticator, and a universal QR scanner.
Envoy 2.3.0 beta introduces a redesigned Sendflow, direct fund transfers between accounts, message signing with Passport, an address explorer, custom block explorer settings, and manual account rescanning.