Encrypt PDF software allows you to encrypt existing PDFs.
BS Editor: Encrypt PDF software is a very flexible and powerful program, Encrypt PDF software allows you to encrypt
(using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) existing PDFs, set permissions,
add user and owner password. For example you can encrypt a PDF without to allow to print it. The button to
print the file will be disabled in Acrobat Reader application, you also can encrypt a PDF allowing the user
to read it only if he know the correct password.

Limitations in the Trial version:
1.Popup a message Box.
2.The trial version is can only process the first half pages from your original PDF file.
3.Remove Outlines, Metadata, AcroForm information from some special PDF documents.
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Usage: EncryptPDF [options]
Copyright (C) 2000-2006 by VeryPDF Inc
Website: http://www.verypdf.com
Email: support@verypdf.com
Build: Jan 27 2007
-i [PDF file name] : input PDF filename or directory.
-o [PDF file name] : PDF file will be generated.
If you not specify the -o parameter, the Default output file will overwrite the input PDF file.
-u : user password.
-w : owner password.
-p : permission print.
-c : permission copy.
-m : permission modify.
-n : enable adding and changing text notes and AcroForm fields.
-e [128 or 40 ] : set encrypt level.
-k : set for all permission bits.
-v : view the PDF file after encrypt.
-l [log file name] : specify log file for output message.
-r [License Key ] : input License Key for this product.
-? : help.
-h : help.
-------------------------------------------------------------------- you can free download Encrypt PDF Command Line 2.3 now.