Would "Someone" Breaks The Undersea Internet Cables?

Not that they would, of course. Any more than they would blow up their own gas pipeline, or break a dam that mostly supplied water to parts of a country it is occupying, but I digress...

Should "someone" start breaking up the undersea cables that carry all those cat pics and Tik Toks we all love so much, what happens?

Your online banking will still work. That runs over Openreach's UK domestic network.

The retail banks have their own private networks. So do the railways and the armed forces. The NHS has a small flock of under-fed carrier pigeons.

All the big companies have copies of their websites disbursed to servers over the world. Amazon will still be up and running. Some services may not work, but we will still be able to buy Chinese junk from it, as long as that junk is physically in the UK.

Your fixed-line calls to domestic numbers either go over Openreach or Virgin's network. Your mobile calls to domestic numbers go over your carrier's mobile domestic network. So you can still send messages saying you have to cancel.

Anyone who really needs international comms will have satellite capacity on standby, as well as redundant undersea capacity in all directions.

So I think that business carries on as usual, but they will use it as an excuse for even poorer service, even if they are not affected.

You can find a detailed map of the world's undersea cables here. It's not a secret. Take a look and it becomes obvious that there are a handful of landing points in each country. Send a special ops team out to blow those up. Or you could follow the land lines back to one of a smaller number of data centres / telehouses, and blow those up. You could always hi-jack an airliner and fly it into one. If that's too extravagant, hire a trawler and sail it past those landing-points trailing a great big net behind you. That's worked any number of times in the Mediterranean over the years. Breaking the cables in the open sea needs submarines and trained divers, so that cuts the suspects down to a short list.

Still. Breaking some ocean internet cables. Sounds bad.

Maybe even as recently as fifteen years ago it would have been. The capacity and the number of cables available today is beyond any projection anyone would have made in 2008. To make a noticeable difference a saboteur would need to break a dozen or so cables on several different coasts within a week of each other. Undersea cables are easier and cheaper to repair than a gas pipe.

More importantly, there's no cyber warfare if there's no cyber-connection to the enemy.