Yes. I would like to go back to your point about bandwidth. I think there is one difference between those two approaches. That is, in the system we're talking about with a dedicated messaging system, a dedicated voting system and a dedicated video conference system, the one that is hungry for bandwidth is the video system. So I would be a bit worried about putting the vote part onto that. It's the one that's most likely to break if you have poor bandwidth.
I would also echo my colleague's comments regarding the availability. In terms of security, if I had to identify what would be of topmost concern to me, because of the context of these votes, I think availability would be of most concern. It would be quite difficult to change someone's vote so that no one saw that, but it would probably be easier to prevent the voting in the first place.
That probably would be a good place to focus the attention.