It sound good BUT until strong punishments are put in place and used, it's all just talk.
I really don't think that countries like North Korea (just to name one of several) really give a damn about a Geneva Convention on internet security.

These type of countries don't give a damn about the Fourth Geneva Convention either. Never have and most likely never will.

Now the idea of the Good Guys getting together using the same play book to fight the Bad Guys on cyber security, it's a great idea as long as it is not controlled by the United Nations. Once again their must be strong penalties that are applied or none of the talk and BSing will get anything done.

Just my opinion.

Jack