How to Access a Password-Protected PDF on a Kindle. The major advantage to PDF files is that you can distribute documents to a wide variety of platforms, including the Amazon Kindle.

How to Use DRM Encrypted PDF Files on a Kindle. Your Kindle device can be a more productive way to work on your documents for reading and annotation. Even documents encrypted with DRM technology ...

Version 2.9 of the universal Kindle app adds magazine and PDF support, along with the ability to email documents for reading on your iPad, iPhone, or iPod touch.