PDF Encrypter can be used to protect your PDF files with 128-bit strength user and owner passwords, set all permissions(such as coping, editing, printing, selecting text and graphics, fill in etc), and prevent PDF files from being printed, changed, copied, extracted, signed, filled, assembled and/or merged. It is the fast, affordable way to encrypt a lot of pdf files to encrypted pdf files once time for saving your time! Its easy to use interface.

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 copy and print 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, Keywords, Subject. You may also select document compression level.

All this coupled with transparent interface and high efficiency makes PDF Encrypter very attractive. Besides, it supports command line.

The license of this software is Free Trial Software, the price is $39.00, you can free download and get a free trial.