We propose a hybrid approach to sanitizing SSDs that combines speed
of cryptographic key destruction with the verifiability of explicitly erasing
the storage media. The technique, called Scramble and Finally Erase (SAFE),
stores encrypted data in the drive and uses a two step process for
sanitization. First, it destroys the key. Then, SAFE erases every physical page
in the SSD. After this step, verification is a simple matter of dismantling the
drive and verifying that the flash chips are actually erased.
Pre-2018 CSE ID: CS2011-0963
