Controller chip with zeroizable root key
AssigneeSeagate Technology LLC
InventorDonald Preston Matthews, JR.
Life of this patent
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Abstract
The present invention is a data storage device that includes a control chip with a zeroizable root key. In one embodiment, the control chip comprises a digital memory, the zeroizable root key being a derived root key obtained by applying a firmware root key to a different root key stored within the digital memory such that the setting of each bit of the different root key is locked.
Claims20
A control chip with a one-time programmable memory in which is stored one of at least two root keys necessary for deriving a zeroizable root key.
A data storage device that includes a control chip with a zeroizable root key, the zeroizable root key being a derived root key obtained by applying a firmware root key to a different root key stored within the digital memory such that the setting of each bit of the different root key is locked.
A method, comprising:
- generating a zeroizable root key by applying an alterable root key to a different root key stored in a one-time programmable memory;
- utilizing the zeroizable root key to encrypt or decrypt data.
Dependencies are inferred from the claim text.