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TechEngage » News » Security

Apple iPhone 5C Password Lock ‘Defeated’ With £75 Hardware Hack

Avatar Of Nouman S Ghumman Nouman S Ghumman Updated: February 28, 2021


A Cambridge computer scientist claims has achieved an iPhone 5C hack the FBI struggled to do with $1 million

Apple’s iPhone passcodes can be bypassed by modifying the smartphone with a £75 cloned memory chip which can brute force the password lock, according to Cambridge computer scientist Dr. Sergei Skorobogatov.

Skorobogatov claims that by cloning the Nand chip on an iPhone 5C, which acts as the device’s main flash storage, he can circumnavigate the lock Apple puts on its iPhones if a password it inputted incorrectly too many times.

Attack of the clone

Gualtiero Boffi |

Skorobogatov has managed to find a different way to breach an iPhone 5C’s security with a method that cost a tiny fraction of the $1 million the FBI reportedly paid a security firm to retrieve data from a locked iPhone owned by San Bernardino gunman Syed Rizwan Farook when Apple refused to lift the lock.

By modifying an iPhone to accept a cloned chip with a password counter set to zero, Skorobogatov was able to have a further six attempts an inputting the correct password into a locked iPhone 5C.

“The process does not require any expensive and sophisticated equipment. All needed parts are low cost and were obtained from local electronics distributors. By using the described and successful hardware mirroring process it was possible to bypass the limit on passcode retry attempts,” he explained.

Each time he reach the incorrect password entry limit, he simply removed the cloned chip and replaced it with a fresh clone with a password counter set to zero, effectively giving him as many attempts at the password it takes to stumble across the right one.

Using this technique it took Skorobogatov 40 hours of work to brute force past the four digit password. However, he indicated that with more recent models, such as the iPhone 7, using this technique many not be possible and would require further research.

FBI director James Comey had previously said that the technique, known as Nand mirroring, would not work on the iPhone Farook used. But it would appear that Skorobogatov’s work has proven him wrong.

Other methods have been used to hack iPhones in various ways in the past, including cloning fingerprints to trick the Touch ID scanner with Play-Doh.

This post was orginally published on: September 19, 2016 and was updated on: February 28, 2021.

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Avatar Of Nouman S Ghumman

Nouman S Ghumman

Vice President and Associate General Counsel

The writer holds an LLM degree in International Commercial Law from the City University of London. He is a Managing Partner at SG Advocates & Legal Consultants. He is also the Vice President and Associate General Counsel at TECHENGAGE. He can be reached at nouman@sgadvocates.com

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