Forensic scientist and author Jonathan Zdziarski has posted the slides from his talk at the Hackers On Planet Earth (HOPE/X) conference in New York called Identifying Backdoors, Attack Points, and Surveillance Mechanisms in iOS Devices. The HOPE conference started in 1994 and bills itself as “one of the most creative and diverse hacker events in the world.” Zdziarski, better known as the hacker “NerveGas” in the iPhone development community, worked as dev-team member on many of the early iOS jailbreaks and is the author of five iOS-related O’Reilly books including “Hacking and Securing iOS Applications.” In December 2013, an NSA program dubbed DROPOUTJEEP was reveled by security researcher Jacob Appelbaum that reportedly gave the agency almost complete access to the iPhone.
UPDATE: Apple has responded, denying the existence of a back door in its iDevices.