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?
@rockslice addressed this in another comment - you use signing certificates to verify it’s the correct code, which is a widely accepted method.
How can a voter verify this though without spending 10 minutes inside the booth?
Remote verification is possible and desirable.
Ideally news companies and hobbyists have access to do this verification before after and during the elections. Also, most local governments could and should pay an auditor company periodically to do the same audit and publish the results.
These processes exist for closed source infrastructure. They’re just better and more effective on open source solutions.