This is an useful tool which can encrypt and decrypt PDF files
PDF Security ActiveX Component can help you easily encrypt PDF with standard 40-bit or 128-bit encryption). With this application you may as well set the permission of the user for printing or modifying.You can make secure PDFs and protect your PDFs in one function call. PDF Security ActiveX also provides the ability to decrypt an encrypted PDF given the password.Both encryption and decryption are done by PDF Security ActiveX Component itself without the need of installing additional software such Acrobat PDF Reader. You can make secure PDF documents easily to achieve password enabled content protection. PDF Security can be easily integrated into applications written in languages that support ActiveX Component such as Visual C++, Visual Basic, Delphi, C++ Builder, .Net languages, Java, Scripts like Perl, Php, Python. PDF Security is .Net ready, you can integrate it into your web application to provide secure PDF solutions for your users. Here are some key features of "PDF Security ActiveX":
· Password protect opening of the PDF document.
· Disable printing of the PDF document.
· Disable copying of text/graphics
· Disable modifications to PDF the document
· Password protection for PDF files with 40 or 128 bit encryption
· Examples in VB, ASP, VB Script are provided.
· Nag screen
· 30 days trial