hello, ? i password protected my pdf files to prevent editing, but somehow it still can be hacked by others to edit the original document, may i know how to let others can not edit ?

[Nalawang]

hello, ? i password protected my pdf files to prevent editing, but somehow it still can be hacked by others to edit the original document, may i know how to let others can not edit ?

[Bernd Alheit]

Simple solution:

Don't give the files in other hands.

[Test Screen Name]

Sadly, yes. When you set a password you should get the warning below. It is true, and important.