Firmware Decryption: For, and By, the Cryptographically Illiterate

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Presented at DEF CON 33 by

Craig Heffner

It's no secret that embedded devices are rife with security bugs just waiting to be found. However, vendors increasingly encrypt their firmware to prevent analysis by researchers, professionals, and inquisitive minds. In this talk, we examine common encryption techniques in real-world devices and how to crack the code—with or without hardware.