The cursor slowly, deliberately, dragged itself to his “Projects” folder. It right-clicked. Selected Encrypt . A dialog box appeared: “File access requires AutoCAD 2016 Portable License. Insert USB key.”

If your needs are not enterprise-level, these free programs are portable and safe:

If you are a student or educator, you may be eligible for a free license of the latest version through the Autodesk Education Community.

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