Extracting Watermarks from a Local File

Prerequisites

• OBS asset access permissions are granted. For details, see Allowing or Disallowing Access to Cloud Assets.
• OBS has been enabled and used.
• The file format is PDF, PPT, Word, or Excel.

Constraints

• This section describes how to extract invisible watermarks from PDF, PPT, Word, or Excel documents.
• The maximum size of a PDF or Word file is 50 MB.
• The maximum size of an Excel file is 70 MB.
• The maximum size of a PPT file is 20 MB.

Extracting Watermarks from a Local File

1. Log in to the management console.
2. Click in the upper left corner and select a region or project.
3. In the navigation tree on the left, click . Choose Security & Compliance > Data Security Center .
4. In the navigation tree on the left, choose Data Security Operations > Watermark Tracing. The Database Watermark Extraction tab page is displayed.
5. Click the Local File Watermark Extraction tab.
   Figure 1 Extracting watermarks
   

6. Click Upload File to upload the local file from which you want to extract invisible watermarks.
   

   Only PDF, PPT, Word, and Excel files are supported.

7. After the file is uploaded, click OK. The invisible watermark content is displayed in the dialog box.

Related Operations

Click next to the target watermark injection task name to view the status of the watermark extraction task.

• Running: You can view the progress of the watermark extraction task.
• Completed: The watermark content is displayed in the Invisible Watermarks column. If there are no invisible watermarks, -- is displayed.
• Failed: The watermark extraction task fails to be executed. You can move the cursor to to view the failure cause.