U.S. officials are examining whether the UK broke a bilateral agreement by reportedly demanding that Apple build a "backdoor" allowing the British government to access backups of data in the company's encrypted cloud storage systems.

Apple has called a secret UK order to let the government see protected iCloud files an “unlawful intrusion.” The iPhone maker has sent an appeal to the Investigatory Powers Tribunal by UK intelligence services and authorities.

Apple has reportedly taken the UK to task over its demand to be allowed access to encrypted iCloud files owned by iPhone users. The company previously refused to add a backdoor to allow encryption to be bypassed and subsequently removed an encryption feature from the UK entirely.

Apple has issued a legal challenge against the British government over a demand to create a backdoor for encrypted iCloud accounts, as reported by Financial Times. The company has filed a complaint in the hopes to reverse the order.

Apple is challenging a UK government order that would force the company to provide access to its customers' encrypted data when needed. According to BBC, the tech giant has appealed to the Investigatory Powers Tribunal,

Macworld Apple has begun legal action to resist a secret demand by the U.K. government for access to iPhone users’ data. Citing “people familiar with the matter,” the Financial Times reports that the company has made an appeal to the Investigatory Powers Tribunal,