Encryption And Compression; Media Properties - HP BB118BV - StorageWorks Data Protector Express Package User Manual

Hardware encryption will be used, if the device supports it. If it does not support encryption and this
option is selected, the user will be prompted with an alert stating that the device cannot be used since it
does not support hardware encryption.
Some variants of Data Protector Express have reduced encryption capabilities. In this case, the
encryption features that are not available will be grayed out.
Options for the software encryption strength are listed below as three selections, low, medium and high.
Low is the easiest method to decipher by outside methods, High is the hardest method to decipher by
outside methods. As you progress from low to high, the encryption algorithm requires more CPU
computations for each block of data to be encrypted, which may slow down the data stream to the device
and will increase CPU loading on the Media Server.
Software encryption disables hardware compression, although you will still be able to select Software
compression.
If Hardware is selected, we recommend that Enable hardware compression is also selected. Hardware
encryption and hardware compression can be used on devices, such as the HP LTO-4 tape drive without
any loss of backup speed.
On the Media Properties page, the encrypted media is depicted with the lock on it. The Platinum colored
lock indicates hardware, whereas the gold lock indicates software encryption. The Media details window
shows the type of encryption used.