So, for a second stop assuming we are in a nuclear bunker. There are many unconnected systems that are still hackable. For example, the Stuxnet worm was able to infiltrate an unconnected SCADA system using USB exploits. Many systems radiate data in EM and ultrasonic (side-channel). And obviously, there are known and unknown backdoors in PCBs, ECs, and ICs. All of these do not require an IP address.
I would even argue that having an IP address can improve security by increasing monitoring, improving continuous security updates and decreasing a false sense of security. This was the original goal of DARPA all along.
The claim is: "No IP address == unhackable."
So, for a second stop assuming we are in a nuclear bunker. There are many unconnected systems that are still hackable. For example, the Stuxnet worm was able to infiltrate an unconnected SCADA system using USB exploits. Many systems radiate data in EM and ultrasonic (side-channel). And obviously, there are known and unknown backdoors in PCBs, ECs, and ICs. All of these do not require an IP address.
I would even argue that having an IP address can improve security by increasing monitoring, improving continuous security updates and decreasing a false sense of security. This was the original goal of DARPA all along.