Question about automatically encrypt virtual products available?

Hello,

I am looking for an online shop that has the option to automatically encrypt virtual products when a customer purchases the product, for example with some key number or anything...

The is mainly important for the sell of e-books.

I know Magento has the option to automatically encrypt pdf files when a customers downloads this.
About the products for magento:
"Auto-encrypt uploaded PDF files of downloadable products with pass=user email and sign=username and order# Protect your E-book dowloads by automatic personalization stamping security! An extension for downloadable PDF ebook password encryption with signature protection."

I am wondering if Zen Cart has something similar like this, but also the option of encrypting ePub files.

I am looking forward to the replies. Thanking you in advance for the help.

Best wishes, Natasja

What you're asking about isn't a "built-in" feature, but could certainly be done with a little bit of custom coding to handle your specific unique requirements. Or there might already be an addon available to offer a feature similar to what you've mentioned.

I'm really interested in this facility. Has there been any progress in this area?