The problem isn’t the key exchange but the data. Most messaging based solutions keep the same individual key exchange for group sessions also instead of figuri

The problem isn’t the key exchange but the data. Most messaging based solutions keep the same individual key exchange for group sessions also instead of figuring out some key ring or exchanging a key between all individuals. This simplifies things and allows you to have only one key exchange algo. Video and any other high bandwidth application would require you to always have a shared key on a group level because otherwise you are doing a lot of extra work and a lot of exra upload.