(Reuters) - Apple ( AAPL ) has appealed against a British government order to create a "back door" in its most secure cloud storage systems, the Financial Times reported on Tuesday citing people familiar with the matter.

Last month, Apple ( AAPL ) had removed its most advanced security encryption for cloud data in Britain, in an unprecedented response to government demands for access to user data.

The change affected a feature called Advanced Data Protection, which extends end-to-end encryption across a wide range of cloud data.

It meant Apple ( AAPL ) could access iCloud backups in certain cases that it otherwise could not, such as copies of iMessages, and hand it over to authorities if legally compelled. With end-to-end encryption enabled, even Apple ( AAPL ) cannot access the data.

Britain's Home Office and the Investigatory Powers Tribunal did not immediately respond to Reuters' requests for comment, while Apple ( AAPL ) declined to comment.