>purpose defined hardware implementation, with a separate protocol, different datagrams (instead of TCP/IP/UDP packets) and independent land line plants, undersea cables, satellites and more.
If you come up with a different network, then the attackers will just switch to that network.
Remember, the internet used to be lots of different networks. I'm old enough to remember bang paths, BITNET, and e-mail taking a week or more to make it across the Atlantic. Even back then, there were vulnerabilities, and even cross-network vulnerabilities.
And a private satellite is a terrible idea for "security." In a previous life I used to have to operate a satellite uplink, and I can tell you that replacing a transponder's intended content with your rogue content is really quite easy if you just put your mind to it. (It's happened before.)
If you come up with a different network, then the attackers will just switch to that network.
Remember, the internet used to be lots of different networks. I'm old enough to remember bang paths, BITNET, and e-mail taking a week or more to make it across the Atlantic. Even back then, there were vulnerabilities, and even cross-network vulnerabilities.
And a private satellite is a terrible idea for "security." In a previous life I used to have to operate a satellite uplink, and I can tell you that replacing a transponder's intended content with your rogue content is really quite easy if you just put your mind to it. (It's happened before.)