iOS 27 Safari Reportedly Blocks More Ad-Tech Identity Domains

Apple’s iOS 27 Safari reportedly blocks ID5, Unified ID 2.0, LiveRamp, Permutive, and other ad-tech domains using a registrable-domain mechanism that could be expanded remotely. The broader shift toward fingerprinting and hardware-derived signals as cookie alternatives underscores durability, user-control, consent, disclosure, and regulatory concerns; effects on identity interoperability, measurement, buyer acceptance, and publisher monetization remain uncertain.