As soon as they upgrade the Abacus
Cyberattacks need to be responded to with Mega Tons. I believe 20 thirty toners will work. Oh Hell make it 40.
They want to do cyber war? One must choose wisely when you poke the sleeping lion with a spear. The spear must be driven into the heart least one suffer greatly. Even a mortally wounded lion can kill you.
It should be noted that atomic weapons exploded in space can devastate the electronic infrastructure of a a small nation or continent dependent on yield and height of the explosion. A cyber-war on the USA by Iran would be unwise. A cyber war against our infrastructure is an act of war and this has consequences. The consequence can be pinpoint retaliation or total devastation. That decision is up to the president!
I would suggest the Mullahs of Iran choose wisely.
Who would retaliate? Russia would not as we as they have the ability to take each other out. China can not take us out at present but could harm us grievously. They would not fight us.
Our weapons are “dial a dose” and can take out electronics in a small area or large and zero fallout from space.