Extract Images from Password-Protected PDF
You can find lots of free programs that allow you to extract images from multiple pdf files at once. However, there are only a few that support image extraction from password-protected pdf documents. One of the few programs is Some PDF Images Extract.
Some PDF Images Extract can extract images from even multiple password-protected pdf files simultaneously. Launch the program, pick all of the pdf files whose images you want to extract, specify the user and owner password for each encrypted pdf file, and hit F5 button to begin the extraction process. You can check the result once the extraction is completed.
Some PDF Images Extract is compatible with Windows 7, Vista, XP, 2003, 2000. Download the software from hereLijit Search