here's some ideas i had so far
>big empty locked room with flat surfaces, no trickity tricks
>floor is suspended in mid air by chains connected to the ceiling so nothing at all could be hidden and everything is in plain view
>non electronic
>everyone is naked, fit, and hairless to not conceal more votes
>glass or transparent ballot box or just use a big bowl
>everyone can see each vote being cast without knowing what the vote actually was, this gives plausible deniability to blackmailed people
>each vote has an individual unique identifying set of numbers, so once every vote is counted in the end everyone can silently verify that their vote is in the ballet box without saying which one was theirs, again plausible deniability
I still feel like i'm missing something important though