Secure peer-to-peer connection network and/or protocols for a group-based communication system, in which, a peer-to-peer connection request associated with a first identifier for a first client device and a second identifier for a second client device are received. The first identifier and the second identifier are compared to a group-based communication system validation registry associated with the group-based communication system and, based at least in part on a determination that the peer-to-peer connection request is authorized per the group-based communication system validation registry, a peer-to-peer connection between the second client device and the first client device is established.