Laser Fault Injection (LFI) is a sophisticated physical attack technique where a focused laser beam is directed at a microchip to intentionally disrupt its normal operation. By precisely targeting specific areas of the chip, attackers can induce faults or errors in its processing. This can lead to unintended behaviors, such as bypassing security checks or extracting sensitive information stored within the device. LFI is mainly used in research, hardware security testing, and by highly skilled attackers, as it requires specialized equipment and expertise. Understanding LFI helps in designing more robust and tamper-resistant hardware systems.