To be clear, they are wireless remotes, but you have to be in the room. And even these dedicated devices are not entirely frustration free, sometimes they have

To be clear, they are wireless remotes, but you have to be in the room. And even these dedicated devices are not entirely frustration free, sometimes they have to revert to hand counting. I don’t think anything is saved within each device, just the totals. They say there’s no way to know how each individual device (and therefore device-holder) voted. I doubt strongly there is any actual crypto guaranteeing this though.