  This paper provides an overview of research programs in cyber security
performed by the U.S Army Research Laboratory. Although ARL is the U.S. Army's
corporate laboratory that focuses on fundamental and early applied research,
the fundamental science endeavors are closely integrated with extensive
operationally-oriented programs. One example is the Cyber Collaborative
Research Alliance (CRA) that brings together ARL scientists with academic
researchers from dozens of U.S. universities. ARL cyber scientists are largely
driven by challenges unique to the ground operations of the Army; this paper
outlines a few of these challenges and the ways in which they are addressed by
ARL research efforts. The long-term campaign of cyber research is guided by the
vision of the future Army battlefield. In the year 2040, it will be a highly
converged virtual-physical space, where cyber operations will be an integral
part of the battle.
