This is a bit disconcerting... "The majority of calling state machines I investigated had logic vulnerabilities that allowed audio or video content to be transmitted from the callee to the caller without the callee’s consent. This is clearly an area that is often overlooked when securing WebRTC applications."

Another great IC photo and write up from Ken Shirriff which explains how Intel's 8087 used different gate widths in its ROM to encode two-bits of information per address.