Imagine being able to prove your age of 21 without revealing your name, address, or date of birth. Jordan Riebel, a doctoral candidate, is with me today to discuss the adoption of mobile driver's licenses (mDLs) and digital identity systems. We discuss how emerging technologies such as selective disclosure and zero-knowledge proofs could allow for age verification and identity checks without the need for unnecessary data collection. Most people don't realize how much personal information they hand over every time they show a physical ID, even when it isn't required. Correct implementation of mobile driver's licenses could reduce that exposure. However, they also raise significant concerns about trust, governance, interoperability, and whether today's privacy promises will change in the future.