ISO 21964 / DIN 66399

The ISO 21964 standard (also known as DIN 66399) defines the different protection classes, categories of data carriers, and levels of security for the destruction of media containing confidential data.

With new technologies, it has become apparent that confidential data can be stored on multiple types of media (paper, hard drives, tapes, etc.) and that their destruction can be classified according to different levels of security defined based on the difficulty of reconstructing the information after the media is destroyed. The ISO 21964 standard classifies data carriers into 6 categories, each represented by a letter.

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    THE DIFFERENT MEDIA TYPES

    paper
    PAPER (P)
    Documents, Archives
    cd
    OPTIC (O)
    CD, DVD, Blu-ray
    tapes
    Magnetic (T)
    Floppy disks, credit cards, tapes,
    magnetic tapes, cassettes
    hd
    Hard drives (H)
    Hard drives and computers (not SSD type)
    elec
    Electronic (E)
    Flash media, SD cards, chip cards, USB stick, SSD disk, cell phones and tablets
    film
    films (F)
    Films and microfilms

    DIFFERENT PROTECTION CLASSES

    The ISO 21964 standard provides 3 protection classes: normal, high, very high. They determine the level of sensitivity of the data by classification (internal, confidential, or secret data) and allow everyone to know the level of security required for the destruction of their data.

    1
    CLASS 1
    PROTECTION NEED: Normal
    SECURITY LEVEL: 1,2,3
    USE: Internal documents, accessible by a large number of employees
    Examples : circulars, newsletters
    2
    CLASS 2
    PROTECTION NEED: High
    SECURITY LEVEL: 3,4,5
    USE: Confidential documents with restricted access
    Examples: personal data, memos
    3
    CLASS 3
    PROTECTION NEED: Very High
    SECURITY LEVEL: 4,5,6,7
    USE: Secret documents, accessible only by a few employees.
    Examples: R&D documents

    DIFFERENT SECURITY LEVELS

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