Katriel Cohn-Gordon is a research scientist, with a PhD from the University of Oxford in information security and applied cryptography. His research aims to formalise and prove the security of some of the protocols underlying today's Internet; recent work includes working on the Messaging Layer Security IETF standard for encrypted group messaging and a formal analysis of the Signal messaging protocol used by WhatsApp and many others. He's also been seen writing fuzzers for WebRTC at Google's Stockholm office, holds a master's degree in mathematics and computer science, and has reviewed papers for various top academic conferences.