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    <h2>Overview</h2>

    <p>There are several SIDs reserved for NT.</p>

    <pre>
    link back to sec page
    </pre>
    <a href="../attributes/security_descriptor.html">sec</a>

    <pre>
    S-1-5-21-646518322-1873620750-619646970-1110
    S for security id
    1 Revision level
    5 Identifier Authority (48 bit) 5 = logon id
    21 Sub-authority (21 = nt non unique)
    646518322	SA
    1873620750	SA domain id
 