Latent heat is the energy a substance absorbs or releases during a phase change, such as water turning to steam or vapor condensing back to liquid, without an immediate change in temperature. The energy goes into changing state, not raising or lowering the measured temperature, which makes phase changes unusually efficient at moving heat.
In cyber security, latent heat matters anywhere electronics are cooled, heated, or deliberately stressed. Attackers may abuse thermal conditions to force throttling, crashes, or data corruption in hardware, while defenders design cooling systems and thermal controls to keep devices stable under load. It also matters in physical side-channel analysis: unexpected heat flow can reveal when chips are active, overloaded, or poorly protected. Understanding latent heat helps engineers predict how quickly a system can shed or store energy during a phase change, which is critical for secure, reliable hardware.