Most hard disk units come in a cushioned carrying case which helps protect them from shock You
must also mark this case with all the required labels.
Marking Compact Discs (CDs)
Labeling a CD is a problem; an SF 707 is required for a CD on which SECRET information is stored,
but there is not enough room on the back (data side) of a CD for the SF 707 or the other labels.
A recommended solution is to place all of the required labels (SF 707, basic ID, classification
authority line, and the declassification or downgrading instructions) on the front (label side) of the CD
and on the protective container. Then label the back of the CD itself with the classification, using a
label small enough to fit on the CDs hub. This way the CD is still labeled "SECRET" on both sides.
Part F: Disposing of Computer-Based Classified Information
When a classified document is no longer needed for current operations, you get rid of it. Disposing
of a paper-based classified document is pretty easy; you remove it from the files and destroy it
immediately or throw it in a bum bag. Disposing of computer-based classified documents which are
stored on some type of magnetic or optical storage media is not always so easy.
Part G: Explanation of terms
Before we discuss disposing of computer-based classified information, there are four terms which
you must understand:
Declassification: As used in AR 380-19, this term has a different meaning than the one you learned
from AR 380-5. As used in AR 380-19, declassification" is an administrative procedure to determine
that classified information stored on a computer storage medium has been removed or overwritten
sufficiently to permit reuse in an unclassified environment .
Purging: A procedure used to totally and unequivocally erase or overwrite all information stored on
computer storage media. Purging is one prerequisite to declassification of magnetic media.
Degaussing : A procedure used to erase all information stored on magnetic media by exposing it to a
magnetic field generated by a device called a "degausser."
Overwriting: A procedure used to erase all information stored on computer storage media by using a
computer program which repeatedly (at least three times) overwrites all locations with ones and
zeroes, or random characters.
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