Launch SysInfoTools PDF manager software the window shown below pops up. To Protect PDF files following steps need to be followed.

Select Protect option to protect a PDF file.
Step: 1
Click on Select file button to select the PDF file that you want to protect.
Step: 2
Select the PDF file which tou want to protect.
Step: 3
Click on Next button.
Step: 4
Selected file is listed in the main window along with its location and size, then click on the next button.
Step: 5
At this step user can set owner password and user password along with the encryption level and click on ok button.
Step: 6
Click on Protect PDF file Button to Protect the PDF file.
Step: 7
Protection Process is completed. Click on the blue link to see the destination folder where Protected PDF file is saved.
Step: 8

1 2 3 4