Explore historical lessons for improving cyber security in this keynote address from the 2014 LASCON conference. Delve into the development of public key cryptography and its impact on modern financial transactions. Discover the importance of considering seemingly foolish ideas and the role of outsiders in advancing cryptographic technologies. Learn how lessons from nuclear weapons risk reduction efforts can be applied to cryptography. Gain insights from Martin Hellman, Professor Emeritus of Electrical Engineering at Stanford University and co-inventor of public key cryptography, as he shares his experiences and perspectives on technological development ethics and risk analysis in the field of cyber security.