This opinion piece should generate some comments, I hope.
“The Defense Advanced Research Projects Agency (DARPA) was established in 1958 to prevent strategic surprise from negatively impacting U.S. national security and create strategic surprise for U.S. adversaries by maintaining the technological superiority of the U.S. military.
To fulfill its mission, the Agency relies on diverse performers to apply multi-disciplinary approaches to both advance knowledge through basic research and create innovative technologies that address current practical problems through applied research. DARPA’s scientific investigations span the gamut from laboratory efforts to the creation of full-scale technology demonstrations in the fields of biology, medicine, computer science, chemistry, physics, engineering, mathematics, material sciences, social sciences, neurosciences and more. As the DoD’s primary innovation engine, DARPA undertakes projects that are finite in duration but that create lasting revolutionary change.”
One of the latest problems that DARPA has attacked is to remove the need for using passwords to use computers. DARPA is saying imagine a day when we sit in front of our computers and type our user IDs and by doing that the computer knows that we are who we claim we are and let us to use the system without a need to provide a password. If I got your interest, take a look at this article from New York Time that discusses what DARPA wants to do and what research community thinks about the idea. Just keep in mind that a number of years ago, many researchers thought many of capabilities like internet that we take granted today were not possible!