Personal data including text messages, contact lists and photos can be extracted from iPhones through previously unpublicised techniques by Apple employees, the company has acknowledged. The same techniques to circumvent backup encryption could be used by law enforcement or others with access to the "trusted" computers to which the devices have been connected, according to the security expert who prompted Apple's admission.

http://www.smh.com.au/digital-life/consumer-security/apple-iphones-allow-extraction-of-deep-personal-data-researcher-finds-20140727-zxi8t.html