Apple and Google describe Exposure Notifications as "Privacy-Preserving Contact Tracing" for COVID-19. The system works across both Android and iOS mobile devices using Bluetooth. The system includes the following features to protect privacy and security:
Whenever you connect to a Wi-Fi network your iPhone identifies itself with its unique MAC address, which creates a privacy risk. Network operators and other observers could potentially track and profile a MAC address by associating it with network activity and location as it is used on public networks over time. To avoid this, Apple has included a new privacy feature in iOS 14 (and iPadOS 14 and watchOS 7) that lets you use a different unique MAC address for each network you connect to.
Apple continues to deliver more granular control over privacy options. The release of iOS 14 adds the ability to decide exactly which photos can be accessed by third-party apps. As always, users can prevent an app from accessing the Photos library or allow an app full access to all images. When specific photos are chosen an app such as Facebook can only read those images, while the rest of your Photos library remains off limits.