Moxie Marlinspike

Matthew Rosenfeld,[2] known as Moxie Marlinspike,[3] is an American entrepreneur, cryptographer, and computer security researcher.[1][3] Marlinspike is the creator of Signal, co-founder of the Signal Foundation, and serves as the CEO of Signal Messenger LLC. He is also a co-author of the Signal Protocol encryption used by Signal app, WhatsApp,[4] Facebook Messenger,[5] and Skype.[6] Marlinspike is a former head of the security team at Twitter[7] and the author of a proposed SSL authentication system replacement called Convergence.[8] He previously maintained a cloud-based WPA cracking service[9] and a targeted anonymity service called GoogleSharing. https://en.wikipedia.org/wiki/Moxie_Marlinspike