iPhone passcode bypassed with NAND mirroring attack
Passcodes on iPhones can be hacked using store-bought electronic components worth less than $100 (£77), according to one Cambridge computer scientist.
Sergei Skorobogatov has demonstrated that NAND mirroring—the technique dismissed by James Comey, the director of the FBI, as unworkable—is actually a viable means of bypassing passcode entry limits on an Apple iPhone 5C. What’s more, the technique, which involves soldering off the phone’s flash memory chip, can be used on any model of iPhone up to the iPhone 6 Plus, which use the same type of LGA60 NAND chip. Later models, however, will require “more sophisticated equipment and FPGA test boards.”
In a paper he wrote on the subject, Skorobogatov, a Russian senior research associate at the Cambridge Computer Laboratory’s security group, confirmed that “any attacker with sufficient technical skills could repeat the experiment,” and while the technique he used is quite fiddly, it should not present too much of an obstacle for a well-resourced branch of law enforcement.