Team Key Revocation
Problem:
The keys of team drives are static and will never change.
Consequences:
Once a user is kicked from a team, the user does not lose the keys. Since are not prevented from subscribing to any Netflux channel, they can still receive all messages and also decrypt them with their kept keys. Hence, they do technically not lose access to the team drive.
Suggestions:
When someone is kicked from a team, the admin has to automatically create a new key pair and distribute it privately to all members.