Patent ID: 8438652

Claim:
A data storage device comprising: a memory configured to store data; a controller adapted to: decrypt encrypted user data stored in the memory; receive a first security code; compare the first security code to a first security key; perform a first unlock of the data storage device to allow a first operation to be performed when the first unlock is successful, the first unlock including determining when the first security code matches the first security key, wherein the first operation does not allow decryption of the encrypted user data; receive a second security code; compare the second security code to a second security key; perform a second unlock of the data storage device to allow a second operation to be performed when the second unlock is successful, the second unlock including determining when the second security code matches the second security key, wherein the second operation allows decryption of the encrypted user data; the data storage device does not allow the first operation to be performed when the data storage device is locked and does not allow the second operation to be performed when the data storage device is locked; and the first unlock and the second unlock can be attempted when the data storage device is locked.