

it is more obvious in the book compared to the film.
The film was loosely based on the book and was explicitly written as a critique on fascism and the book. Verhoeven and Neumeier have said as much.
But also, I don’t think you know what fascism is. There’s always people in a fascist state that have a good quality of life. The question is what happens to people that don’t fit in the state mold? What happens to enemies of the state? Who gets classified as an enemy of the state? Who holds power or can hold power in the state? The fact that to be a citizen you’d have to start by joining the state party is de-facto a fascist state.
If you were part of the Nazi party in germany as a non-jew/communist/or someone with a disability. Life was pretty good. So good that US newspapers had Hitler as person of the year and sung him praises. They had commerce and a strong economy with most people having great lives. Nazis were popular and liked by the people because they saw them as making their lives better. And you could get a high ranking position in the government by joining the military and serving a term.
In the film, the enemies were the Arachnids. War started because of the colonization of arachnid territories and extermination was the next order of business. Even though Arachnids are depicted as being thinking and intelligent beings. That was the point of the final scene “It’s afraid!”. Rather than try to understand or communicate with the alien/foreigner/etc, the government prioritized extermination and learning to make it fear them.
No, not possible.
The closet we’ve seen are the zodiac killer’s scribbles and they lasted as long as they did because he made a mistake (and frankly because no security researcher was really trying).
Modern cryptography works because it shuffles data around so much that it appears random. There’s simply no way to do those sorts of operations with just pen and paper.