Diane Joyce discusses moving away from a one-size-fits-all authentication model and toward a risk-based and frictionless approach known as "just enough authentication." This involves minimizing customer inputs during authentication by applying a risk-based model to determine when additional authentication is needed. It also means designing authentication as a flexible part of the overall user experience rather than a separate step. The goal is to authenticate users with as little friction as possible while still maintaining appropriate security based on the level of risk for the given transaction.