Patent ID: 9659191
Date: 2017-05-23
CPC Classifications: G06F,H04L

Claim:
1. A method, comprising: determining an encryption key for use in encrypting data stored to a data storage medium, the encryption key including a hidden root key combined with a zeroizable key; storing a first portion of the hidden root key to a re-writable storage location; storing at least one bit of the hidden root key in a one-time writable storage location, the one-time writable storage location including one or more electronic fuses; storing the zeroizable key in the one or more electronic fuses; blowing at least one of the one or more electronic fuses to render the encryption key unusable; encrypting the data using the encryption key; storing the encrypted data in the data storage medium; determining that the stored data is to be deleted; and modifying the at least one bit of the encryption key stored in the one-time writable storage location.