The speaker says that an internet key protecting TLS and WebPKI connections was secured using the number four.

“Um, you know, there, there's a, uh, a one that's kind of, uh, coming out today and has been started to, uh, be, uh, blogged about and tweeted about, uh, where, uh, one of the keys, uh, on the internet, uh, is, uh, uh, that protects, uh, all TLS and Web PK- Web, WebPKI, uh, which just secures all your connections, uh, was, uh, um, was secured by the number four.”