Securing digital keys when your phone unlocks the car

An interview with Alysia Johnson (Car Connectivity Consortium) describing how Digital Key evolved from single-vendor features to an interoperable standard; Version 4 emphasizes certification, interoperability testing, and consistent behavior across devices and vehicles rather than addressing a new attack class. The piece explains NFC fallback protections (proximity and user-intent checks), fast credential revocation with both backend synchronization and vehicle-side enforcement, and crypto agility including discussions about post-quantum readiness over long vehicle lifecycles.