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Data-leakage is the uncontrolled, unauthorized transmission of classified information from a data centre or computer system to the outside. Such leakage can be accomplished by physical removal of data storage devices (diskettes, tapes, listings, printouts and photographs of screen copies or handwritten notes) or by more subtle means such as data hiding (steganography) or even plain old human memory.

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Is it possible to prevent unauthorized copying or recording of data by photographing screens?

Another novel (goofy) idea to reduce the need for physical searches is have the computer screen replaced by an eyepiece, like on a microscope. Then the room can be monitored to prevent the user puttin …
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