David Chaum is one of the earliest blockchain researchers and a world-renowned cryptographer and privacy advocate. Known as “The Godfather of Privacy,” Dr. Chaum first proposed a solution for protecting metadata with mix-cascade networks in 1979. In 1982, his dissertation at the University of California, Berkeley became the first known proposal of a blockchain protocol. Dr. Chaum went on to develop eCash, the first digital currency, and made numerous contributions to secure voting systems in the 1990s. Today, Dr. Chaum is the Founder of Elixxir, Praxxis and the xx network, which combines his decades of research and contributions in the field of cryptography and privacy to deliver state-of-the-art blockchain solutions.