cjc;Whether you construct your eBook using HTML or PDF content is a matter of preference but if you're concerned about security and password protection consider this....
Most eBook compilers, including Activ E-Book, only encrypt and password protect HTML web pages and the password protection only applies to the HTML content. Everything else, including images, sound files, flash content, movies, and PDF files remains unprotected and accessible in a temporary folder.
If your content is in a Word file, RTF file or other document file you need to convert this content into HTML format if you want password protection. Depending on your skill level this can sometimes be quite difficult. There are programs available that can convert textual content into HTML format, but you'll probably still need to reformat, design and "style" that content.
Personally I do my draft work in a RTF program and (cut and paste) that content into pre-designed web pages.
Some people might find working with Adobe PDF files easier and more efficient. If you have a finished PDF document it's the easiest way to create an eBook but PDF files have a big security problem.
Ebook compilers and security systems (including expensive online systems) promise PDF security but in reality the only security they provide is download (or right of access) protection. After a customer gets your PDF file and is given a PDF password to open the file all security is lost. ANY PDF file with a known password can be easily hacked.
HYPrLock is the only security system that protects the actual PDF file itself. It uses a unique two step approach to provide maximum protection.
In Step1 HYPrLock uses Activ E-Book passwords to ensure only paying customers get access to the file and to prevent the PDF file from being shared on a second computer.
In Step2 HYPrLock uses the HYPrPDF security system with invisible PDF passwords to actually open the PDF file. Your customer never gets the PDF passwords, they never enter the PDF passwords, they never even see the PDF passwords. Keeping the PDF passwords invisible prevents anyone from hacking your PDF file.
Ron