Ahead PDF Encrypt is a simple tool designed to encrypt your PDF files,. With Ahead PDF Encrypt, you can easily set the owner password and restrictions on printing, editing and copying.
You can also encrypt a PDF document by setting the user password, no one can open the PDF document except he knows the correct password. With Ahead PDF Encrypt, you can also batch edit and modify your PDFs metadata, such as PDF Title, Subject, Author and Keywords.
Ahead PDF Encrypt Features:
1. Supports 40-bit RC4, 128-bit RC4 and 128-bit AES encryption.
2. Supports user password and owner password.
3. Support add printing, copying and changing permissions to a PDF file.
4. Support set the document title, subject, author, keywords to a PDF file.
5. Support PDF 1.0-1.7 format.
6. Support batch encrypt.
7. No Adobe Reader or Acrobat needed.
8. User-friendly interface, easy to use.

Limitations:
* Can only encrypt the first page of PDF files.

The license of this software is Free Trial Software, the price is $25.95, you can free download and get a free trial.