Demonstration how malware can encrypt and decrypt payloads using the Discrete Fourier Transform (DFT). It provides a simple C example showing how mathematical transforms can hide shellcode and help evade static signature-based detection.
Breaking Flash Encryption on Espressif ESP32: Side-Channel Attacks Against Embedded Security
Researchers demonstrated that flash encryption on Espressif ESP32 chips can be broken using side-channel power analysis. By measuring power traces during AES operations, attackers can recover encryption keys and potentially decrypt firmware stored in flash memory.