Tinfoil lets you convert an old smartphone into a secure cryptocurrency hardware wallet. Tinfoil lets you keep your private keys in a offline device, and easilly operate with them in a safe way. All communication is done via auditable QR codes.
- (Optional) - Do a factory reset of your smartphone
- Install Tinfoil app
- Switch on airplane mode
You will need an online device (phone or laptop) in addition to your offline smartphone.
| Step | |
|---|---|
| Generate a transaction using the online device. You can use the Tinfoil transaction builder | |
| Scan the transaction with your Tinfoil device | |
| Check transaction details and sign the transaction | |
| Scan the signed transaction with the online device, and boardcast to the network. |
- BIP32
- BIP44
- Import wallets (mnemonic and WIF), restore backups.
- Litecoin, Ethereum support
- Keep your wallets paper backups in a safe place. Keep redundant backups. The paper backup encryption is easy to brute-force.
- Don't charge your Tinfoil device in public USB ports, use a charger you trust, or a power only USB cable.
- Keep your Tinfoil device safe, the encrypted private keys can theoretically be extracted if you have the device.
- Switch your Tinfoil device off when you are not using it, and if you can, remove the battery.