Deep fakes—highly realistic and difficult-to-detect depictions of real people doing or saying things they never said or did—are a profoundly serious problem for democratic governments and the world order. A combination of technology, education, and public policy can reduce their effectiveness.

Russia's information warfare operations, aimed to weaken adversaries' social cohesion and political systems, are complex and adaptive, but Western governments can take steps to guard against them.

U.S. surveillance activities have alarmed European partners, throwing the future of transatlantic digital trade into question. The United States should embrace collaboration and protections for perso…