Electronic voting: existing systems are horribly insecure, that's quite common knowledge.
What is missed quite often though, that we can't EVER _secure_ electronic voting and not because of technical limitations, rather because of the nature of what we mean by secure in a voting context.
You see elections are like mexican standoffs on steroids or to put it in other words, a distributed trust problem where different groups don't trust each other!
Therefor security in voting is also about trust and VERIFIABILITY.
This is why pen & paper is great, random election observers need no special skills to verify.
With computers it's: trust the hardware manufacturing process, trust the OS, trust the full chain of software, trust the reporting chain from there on up.
Distinct groups have no reasonable way to independently verify results. Normally, you can trust at least _some_ higher authority in computing. Not with elections, though.
@szbalint pen & paper have the advantage that the voter themselves can know that their vote was recorded correctly