Offline wallets can by used to protect private keys
from hackers, monopolistic corporations, authoritarian governments,
and other security threats.
To install the offline wallets, download
min-wallets-offline-v050.zip
onto a thumb drive or SD card, move the zip file to an air-gapped device and unzip it there
(the air-gapped device should never be connected to the internet).
On the air-gapped device, open offline/index.html and use the wallets to manage keys and sign transactions.
A connected device such as a phone can be used to retrieve the
parameters (such as wallet nonce and gas price) needed to prepare transactions.
Once signed, transactions can be saved to text files, moved back to the online device,
and safely broadcast to the Ethereum network.