Dr. Sandra K. Johnson will present an overview of blockchain, a distributed ledger technology. Her lecture includes the specifics of blockchain as the foundation for cryptocurrencies, the emergence of blockchain as a solution for the reconciliation of peer-to-peer transactions and other interactions between non-trusted parties, distributed consensus and other blockchain concepts. She will also touch on blockchain implementations, including those for Bitcoin, Ether and some of the implemented cryptographic algorithms. Furthermore, Johnson will discuss smart contracts, safety and security and the game-changing potential of blockchain as a new methodology for disintermediating businesses. Sandra K. Johnson is the Founder, CEO & CTO for Global Mobile Finance, Inc., a fintech startup company, and the Founder & CEO of SKJ Visioneering, LLC, a technology consulting company. She earned her B.S., M.S. and Ph.D. degrees, all in electrical engineering, from Southern University, Stanford University, and Rice University, respectively, becoming one of the first African-American women to earn a Ph.D. in this field.