Apple has filed a complaint with the UK's Investigatory Powers Tribunal, challenging a government order to break the encryption of iCloud data. The order, issued under the Investigatory Powers Act, requires Apple to allow a backdoor into its iCloud network, which could be used to gather data on individuals. Apple has responded by disabling its Advanced Data Protection feature for UK users, removing end-to-end encryption for certain types of data. The case is set to be heard this month and marks a first-of-its-kind legal challenge.