13.4 Confidentiality of Communications

The fact that communication is taking place cannot be hidden from adversaries that can observe the network, so this has to be regarded as public information.

Communication certificates may be opaquely shared using postMessage(message, options) in anticipation of future needs. User agents are strongly encouraged to isolate the private keying material these objects hold a handle to, from the processes that have access to the RTCCertificate objects, to reduce memory attack surface.