Coinkite Newsletter: Bitcoin Security, COLDCARD Updates & Key Research

COLDCARD 5.5.1 and 1.4.1Q

New COLDCARD Release: Versions 5.5.1 (Mk4/Mk5) and 1.4.1 (Q)

Everything You Need To Know About Passphrases

A Brief on Private Keys & Wallets

Monitor the Coinkite Blog for Security Updates

Official, timestamped COLDCARD advisories, firmware notices, and migration guidance.

One COLDCARD, Many Wallets: Better Backups with BIP-85

Use COLDCARD BIP-85 to derive separate child seeds for compatible wallets, reduce seed-backup sprawl, and keep the parent seed off every destination device.

arca Reservations Are Open

Offline Is Not Enough: COLDCARD vs a Disconnected Phone

COLDCARD 5.5.1 and 1.4.1Q

New COLDCARD Release: Versions 5.5.1 (Mk4/Mk5) and 1.4.1 (Q)