How Does Offline Bitcoin Signing Work Step by Step
Summary
The article explains offline Bitcoin signing, where the private key remains on an air-gapped device while transactions are built online as PSBT files. It covers the PSBT/BIP-174 standard, compares hardware wallets, discusses risks like the Dark Skippy attack, and introduces the concept of no key at rest as a security model. It aims to provide a practical, step-by-step guide and security context for offline custody of bitcoins.