The Apple A8 architecture inside the iPhone 6 and 6 Plus represents a turning point in mobile forensics, marking the widespread enforcement of hardware-encrypted storage tied directly to the CPU. If an iPhone 6 suffers severe liquid damage, a simple "chip-off" extraction of the NAND flash memory is unviable. The raw data on the NAND chip is encrypted using a unique hardware key embedded inside the A8 processor.
To successfully recover court-admissible evidence, cleanroom technicians must perform board-level restoration. In cases of advanced corrosion, engineers execute a "CPU and NAND transplant." Using precise BGA rework stations under a stereomicroscope, technicians desolder the A8 CPU, the NAND flash, and the EEPROM (containing the baseboard calibration data) from the destroyed logic board. These three paired components are then micro-soldered onto a known-working, donor logic board. Once the underlying hardware framework is rebuilt, forensic software can securely access the unencrypted operating system.
