I see stories about how election is rigged or that there are security vulnerabilities and lots of people don’t believe the outcome. Why don’t they just open source everything so that anyone can look at the code and be sure the votes are tallied correctly?
That’s a very easily solved problem. You generate a code-signing certificate (already used all over the place, and why Windows occasionally tells you that software “isn’t trusted”).
You then verify that certificate in the presence of observers from all parties. At the same time that you verify the anti-tamper tags on the ballot boxes.
The parties only have to trust the person they assigned as an observer.