  The 2022 Russian invasion of Ukraine is being fought on two fronts: a brutal
ground war and a duplicitous disinformation campaign designed to conceal and
justify Russia's actions. This campaign includes at least one example of a
deep-fake video purportedly showing Ukrainian President Zelenskyy admitting
defeat and surrendering. In anticipation of future attacks of this form, we
describe a facial and gestural behavioral model that captures distinctive
characteristics of Zelenskyy's speaking style. Trained on over eight hours of
authentic video from four different settings, we show that this behavioral
model can distinguish Zelenskyy from deep-fake imposters.This model can play an
important role -- particularly during the fog of war -- in distinguishing the
real from the fake.
