Explore the emerging threat of power attacks in multi-tenant colocation data centers through this 24-minute conference talk. Delve into the security challenges faced by shared power distribution systems, analyze the cost implications of power attacks, and discover a voltage side channel for precise attack timing. Examine experimental data from voltage measurements on a Dell server, investigate power supply dynamics, and gain insights into the relationship between power spectral density and server power. Understand the accuracy of the voltage side channel and its implications for timing attacks, concluding with a detailed examination of server power supply characteristics.