The article examines the concept of transparency and its effect on international crises. It tests two possible “logics” of transparency, one positive and one negative. In the former, transparency is seen as defusing international crises by illuminating other states' peaceful intentions and ameliorating the security dilemma. In the latter, transparency is seen as exacerbating crises by overwhelming diplomatic signals with the “noise” of domestic politics and confusing opponents about which domestic voices are authoritative expressions of state policy. The authors conclude that, surprisingly, transparency makes conflicts worse more often than not—a conclusion that casts doubt on one possible explanation of the democratic peace.