In the digital age, we've seen a steady evolution of threats, but none perhaps as chilling as the rise of deep fake voices and videos. The ability to mimic someone's voice and use it for malicious intent—from convincing others to take potentially dangerous actions, to fraudulent payments, or even opening security gaps—is a threat too severe to overlook. So, how do we safeguard ourselves in a landscape where our ears can't always be trusted? Enter the challenge response phrase or word.