KYC, or “know your customer,” is a process intended to help financial institutions, fintech startups and banks verify the identity of their customers. Not uncommonly, KYC authentication involves “ID images,” or cross-checked selfies used to confirm a person is who they say they are. Wise, Revolut and cryptocurrency platforms Gemini and LiteBit are among those relying on ID images for security onboarding. But generative AI could sow doubt into these checks. Viral posts on X (formerly Twitter) and...