Just a few days ago, Dr Sergei Skorobogatov, who works at the University of Cambridge laboratory, was able to develop a method to crack an unknown pin code on an iPhone 5c. He did it by removing the Nand chip, which is the main memory of the phone, studying how it communicated with the phone and successfully cloning it.
The purpose of this is to allow for an unlimited number of passcode attempts as usually an iPhone will lock up after a few incorrect tries. This directly contradicts a claim by the FBI that this method (called Name mirroring) would not work during the time they were attempting to access San Bernardino gunman Syed Rizwan Farook’s iPhone 5c.
Dr Skorobogatov made a YouTube video demonstrating his method of removing and replacing the Nand chip and the successful reset of the passcode lockout counter.
Using this method, he was able to crack a 4 digit code in about 40 hours and a 6 digit code could take hundreds of hours. In order to crack newer phones, Dr Skorobogatov said more information was needed about how Apple stored data in memory and he would need a more sophisticated set-up to extract the memory chip.
Apple has not responded to this yet.
Link to original article: http://www.bbc.com/news/technology-37407047