Air-Gapped Key Storage

Air-gapped key storage is a security practice where the devices holding sensitive private keys are kept physically isolated from any network, including the internet. This prevents remote attackers from accessing or stealing the keys through software vulnerabilities or network exploits.

To sign a transaction, the user must physically transfer the transaction data to the air-gapped device, sign it, and then move the signed transaction back to an online machine. While this process is cumbersome, it provides the highest level of protection against digital theft.

It is commonly used for cold storage of institutional-grade governance keys and large treasury assets. This method effectively turns a digital asset into a physical one, requiring physical access to compromise.