This level has very complex setup options, using advanced software/hardware wallets, an offline computer, and a Gnosis Multi-Signature Wallet. This section is only recommended for expert users who are very technical or have a lot of funds to protect.
3 of 5 Gnosis Multi-Signature Wallet, Using an "Offline Computer" 🌨
Setup/boot your Air-Gapped Offline Computer.
Boot Tails OS via USB on your Offline Computer.
Setup 5 Level 2 software or hardware wallets. Record those 5 account addresses offline.
Boot your Online Computer.
Open https://wallet.gnosis.pm/ in a secured browser.
Use your Ledger Nano S to activate the wallet dApp.
Specify your 5 account addresses as the owners of the wallet.
Specify a daily limit. Keep it reasonable.
Deploy the Wallet contract.
Test a small
submitTransactiontransaction withdrawal with all 5 accounts, with the destination set to the account used.
- By following this withdrawal process, hackers can see that you have potentially read this article and are following these instructions.
Once all accounts successfully have withdrawn a small amount of funds from the wallet, deposit an amount slightly larger than the Daily Limit.
Attempt a 3-signature withdrawal from the multi-signature wallet.
Now you can use that multi-signature wallet as your cold wallet.