I have a computer but it is not secured. I have an idea, maybe I will have to import my wallet in the desktop electrum wallet, after signing I will uninstall the wallet.
Even better: instead of importing your existing wallet, create a new one on your desktop and use it only for signing. Write down the seed phrase, and write "used for staked address on Bitcointalk" on the paper.Importing funded wallets always increases the risk.
This is a great idea