Science & Technology

This policy brief is based on “What Is the Cyber Offense-Defense Balance? Concepts, Causes, and Assessment,” which appears in the winter 2016/17 issue of International Security.

Does cyberspace favor the offense, as many analysts and policymakers claim? Three factors undermine any cyber offensive advantage, as demonstrated in a cost-benefit analysis of the Stuxnet operation against Iran. First, any measurement of the offense-defense balance must consider a cyber operation’s value as well as its cost to both sides. Second, organizational capabilities play a significant role in determining the balance. Third, offensive advantages decline when attackers target physical infrastructure rather than information networks.

"CSIA's research on cooperative denuclearization began during the August 1991 putsch against Mikhail Gorbachev. To those of us familiar with nuclear weapons, their construction, and command and control, and with the looming revolution about to sweep the then–Soviet Union, it was plain that a new and unprecedented danger to international security was emerging. An appropriate policy response to this new form of nuclear threat could not be fashioned from traditional Cold War tools of deterrence, arms control, and military preparedness alone. Safety could only be sought through new policies emphasizing cooperative engagement with the new states, new leaders, and military and industrial heirs of the former Soviet Union...."

Book by Ashton B. Carter, Kurt M. Campbell, Steven E. Miller, and Charles Zraket