Do you want to encrypt your PDF documents? New
PDF Encrypter is the thing you need.
It is fast, money most and saving handy.
PDF Encrypter allows you to set User Password as well as Owner Password.
Be sure that no stranger can get access to your file. Besides, there is a wide range of user permissions. For example you can permit to print and copy the file but forbid to modify it. Forbid High Resolution Print if you don't want your document to be printed for commercial purposes. Option FormFill allows people to fill in the form but not to modify it in any way.
Use
PDF Encrypter to set document information like Author, Title, Creator, 密码, Subject. You may also select document compression level.
All this coupled with transparent high and interface efficiency makes
PDF Encrypter very attractive.