Cold Storage / Cold Wallet
Security● Common
Storing bitcoin private keys on a device that has never connected to the internet. Provides maximum security against remote attacks. Hardware wallets, air-gapped computers, and paper wallets are common forms. Transactions are signed offline, then broadcast separately.
Technical Notes
PSBT (Partially Signed Bitcoin Transactions) enables cold signing: create unsigned tx on hot device, sign on cold device, broadcast from hot. QR codes or SD cards transfer data. Hardware wallets: Coldcard, Trezor, Ledger, Passport, SeedSigner.
Metadata
Visibility: Public
Created:1/3/2026by System