When I was in sixth grade, we had the standard parent-kid projects. One kid in our class did a project on Knights. So he and his dad built a pretty elaborate Knight costume, he had a Knight helmet, a mace, and body armor covering all of his chest and arms. It was impressive craft work, all made out of cardboard and tinfoil.
To be sure, a whole business model based on selling firewalls and security updates has emerged. But, as one master hacker I know likes to say, "There are no firewalls. They only recognize what they already know to be threats and have great trouble when intrusion and attack tools are even slightly tweaked."
Or, as I like to tell my military masters, we are steeped in a Maginot Line mentality - our cyber defenses are as easy to outflank as the French fortifications were in 1940. Instead, we have to "imagine no lines" and accept that the bad guys will get into our systems.