Advanced Data Protection (ADP) is an optional security feature for Apple’s iCloud that provides end-to-end encryption for the majority of user data stored in the cloud. This means only the account holder’s trusted devices can access the encryption keys, ensuring that neither Apple nor any third party can decrypt the data. ADP covers various data categories, including iCloud Backups, Photos, Notes, Reminders, Safari Bookmarks, and more, increasing the number of encrypted data types from 14 to 23 when enabled.
ADP is not enabled by default; users must opt in and ensure all their Apple devices are updated and have two-factor authentication enabled. Once activated, it offers robust protection against unauthorized access, even in cases of subpoenas or data breaches. However, it also limits certain functionalities, such as web-based access to iCloud data.
Recently, ADP became controversial in the UK due to government demands under the Investigatory Powers Act for backdoor access to encrypted files. Apple refused to create such a backdoor and decided to withdraw ADP from the UK rather than compromise its encryption standards.
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