Deep dive analysis on how FaceTime for Web uses WebRTC. Philipp “Fippo” Hancke uses webrtc-internals, Wireshark, and reviews the JavaScript implementation to expose Apple’s implementation details.
Reverse-Engineering
How does the new Azure Communication Services implement WebRTC? (Gustavo Garcia)
Walkthrough and deep analysis of how Azure Communications Service makes use of WebRTC by Gustavo Garcia
RED: Improving Audio Quality with Redundancy
Back in April 2020 a Citizenlab reported on Zoom’s rather weak encryption and stated that Zoom uses the SILK codec for audio. Sadly, the article did not contain the raw data to validate that and let me look at it further. Thankfully Natalie Silvanovich from Googles Project Zero helped me out using the Frida tracing […]
How Zoom’s web client avoids using WebRTC (DataChannel Update)
Editor’s Note: This post was originally published on October 23, 2018. Zoom recently started using WebRTC’s DataChannels so we have added some new details at the end in the DataChannels section. Zoom has a web client that allows a participant to join meetings without downloading their app. Chris Koehncke was excited to see how this […]
The WhatsApp RTCP exploit – what might have happened?
As you may have heard, Whatsapp discovered a security issue in their client which was actively exploited in the wild. The exploit did not require the target to pick up the call which is really scary. Since there are not many facts to go on, lets do some tea reading… The security advisory issued by […]