Security, ContinuedDisk securitymarkingsTo avoid confusion, set aside groups of disks for recording classified data ateach security level. Mark each disk or diskette with a stick-on label with theoverall security classification and a permanently assigned identificationnumber. When you declassify and degauss the disks, remove all externallabels indicating the classification unless you immediately use the disk tostore information of the same classification level.Display screensecuritymarkingsWhen you use the computer to create classified graphics and text, make sureto mark the computer monitor at the top above the screen with theappropriate security classification.Hard copysecuritymarkingsMark hard copy reports or printouts from a printer, terminal, plotter, orother computer equipment at the top-and-bottom-center of each page with theappropriate classification or the word unclassified. Number each pageconsecutively. In most cases, do so as you compose the artwork or text inthe computer. If you are in doubt about security markings, consultOPNAVINST 5510.1.MediadispositionMagnetic media, such as disks, eventually wear out or become damaged. Ifthe disk contained classified material, degauss or erase it before destruction.Handle and dispose of printer ribbon and carbon paper used to print/transferclassified information according to the highest classification level of the dataprinted by that ribbon or carbon. Follow the requirements outlined in theOPNAVINST 5510.1.EquipmentinventoryIn addition to safeguarding the information in a computer, protect the custodyof the system. Do not indiscriminately move the system in and out of workspaces. If you must loan equipment, limit equipment loans and haveborrowers sign for custody of the loaned gear. Keep an inventory identifyingthe equipment by make and model, the type of system the equipment is partof, the mode the equipment operates in, what kind of information and mediathe computer processes, and the level of sensitivity for the highestclassification of material processed. Post the name and phone number of thephysical security officer and/or ADPSO near the workstation.3-42
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