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This video tutorial demonstrates how to add security to a PDF to prevent unauthorized sharing. Protected PDF files are locked to individual devices, requiring users to download a secure viewer and activate a license to view them. The DRM tool Safeguard PDF security can be used to protect documents from copying, editing, printing, and screen grabbing. When a PDF is secured with Safeguard, it is automatically protected against copying, preventing users from copying and pasting text from the document in the secure viewer. Sharing a copy of the file is pointless without a valid license file installed on the recipient's device.