Facebook today announced Fizz, an open source developer library built to implement TLS 1.3, the latest generation of the Transport Layer Security protocol designed to better secure Internet traffic.
More than half of the company's online traffic is secured with TLS 1.3, which uses encrypting handshake messages to keep certificates private, redesigns the way secret keys are derived, and uses a zero round-trip connection setup to accelerate requests. More than a billion people use Facebook, and TLS 1.3 secures data in transit from apps to its corporate servers.
Both Fizz and TLS 1.3 have been globally deployed in Facebook's mobile apps, its C++ HTTP framework Proxygen, load balancers, internal servers, and its QUIC library. The company is open-sourcing Fizz to help drive deployments of TLS 1.3 across the Internet and to make apps and services faster and more secure.
Facebook anticipates its percentage of Internet traffic secured with TLS 1.3 will continue to grow as browsers and apps continue to add support for it.
Read more details here.