eMMC & UFS security is one of the critical but mostly overlooked areas in the mobile security today. Being situated in a typical mobile platform architecture on a very low level, eMMC & UFS subsystems provide abilities to control processes from the earliest stages of establishing the chain of trust and then, through the whole mobile platform operation life-cycle. Security mechanisms, implemented in eMMC & UFS, play a very critical role in mobile platforms security architectures. Compromising these security mechanisms leads to compromising of mobile platforms security itself. All these factors make eMMC & UFS subsystems a perfect target for malicious attackers with a potentially huge impact on mobile platforms security and privacy of their users.