The 2nd amendment has been reduced in scope not because guns are less effective than they were 200 years ago, but because militias no longer exist. It’s not that you with your musket would go and fight King George, it’s that you and your city/county/state would. The militia of today would be local (state level?) and have access to tanks, rocket launchers, all the stuff the federal army has (would there even be a federal army)? You could subdivide that further and have county level militias, etc.
Completely agree that encryption is vitally important. I think there was a company in Texas a few years ago that did completely encrypted email in such a way that even they could not read what was on their servers. I think the FBI told them to change that or be shut down. They chose to be shut down. Proton mail in switzerland is one option, but it would be nice for the land of the free to have an option.