New APIs are reshaping digital advertising, but a new study finds that IP address matching is missing the mark.

Private Relay is an iCloud+ feature designed to deflect marketers, advertisers, and other parties interested in tracking you across the internet without your direct consent. The service, which remains ...

Connect to a VPN and you'll be assigned a random IP address from one of the VPN servers – and you'll share this IP address with thousands of other users. This sharing model has its advantages, like ...