Young scholars explain that a code is a system of symbols, letters, words, or signals that are used instead of ordinary words and numbers to send messages or to store information. They practice deciphering a variety of secret codes used...

This is the text and video of Arthur W. Coviello's keynote speech at the RSA Conference delivered on February 25, 2014, in San Francisco, California.

This is the text, audio, and video [40:52] of Secretary of Defense Ashton Carter's Drell Lecture on innovation and cybersecurity delivered on April 23, 2015, at Stanford University, in Palo Alto, California.