Stefano Tommesani

  • Increase font size
  • Default font size
  • Decrease font size
Home

Opening password-protected PowerPoint presentations

Hits

PowerPoint presentations can arrive in different file formats:

  • PPT is the default file extension for saving presentations in PowerPoint 2003 and earlier versions.
  • PPTX is the default file extension for saving presentations in PowerPoint 2007 and later versions.
  • PPS is the the show mode extension in PowerPoint 2003 and earlier -- these files run in "play-presentation" mode when double-clicked.
  • PPSX does the same thing in PowerPoint 2007 and later -- it runs in "play-presentation" mode when double-clicked.

For editing a PPSX file, instead of double clicking on it, as it would start the "play-presentation" mode, open PowerPoint and then open the file:

PPSXpowerpointopen

Still, if the PPSX file is password-protected, you have to enter the correct password to unlock it and be able to alter the contents and paste them in other presentations:

PPSXopenfile

Or not?

Actually we can open password-protected PowerPoint PPSX presentations without knowing the password. In explorer, rename the presentation, changing the file extension from PPSX to ZIP:

PPSXrename

Then open the ZIP file, and search for the presentation.xml file in the ppt folder:

PPSXopenzipfile

Extract the presentation.xml file from the ZIP file, then open it in a text editor (here is Notepad++, but plain Notepad will do just as well)

PPSXeditxml

Close to the end of the file, find the tag highlighted, starting with

<p:modifyVerifier cryptProviderType="rsaAES"

mark it and then delete it, like this:

PPSXeditedxml

Save the file, then put it back into the ZIP file in the same position, replacing the unedited one:

PPSXreplacefile

Finally, rename the ZIP file back to the PPSX extension:

PPSXrenametoppsx

Done! Now open PowerPoint, and open the Pres.ppsx file:

PPSXunprotected

Mission accomplished! All the contents of the presentation are now at your disposal.

DISCLAIMER: if there was a password, then probably there is a good reason for blocking access to editing and/or copying contents of a presentation. By following this technique, you assume all the responsibilities for an action that could infringe laws and could be legally prosecuted. I accept no liability for the content of this site, or for the consequences of any actions taken on the basis of the information provided.

Quote this article on your site

To create link towards this article on your website,
copy and paste the text below in your page.




Preview :


Powered by QuoteThis © 2008
Last Updated on Sunday, 23 November 2014 12:49  

Latest Articles

A software to stand out 27 January 2018, 14.35 Web
A software to stand out
Standing out of the pack starts by being visible, and being noticed by the right group of professionals. No matter how good your profile is, it is lost in a sea of similar profiles, so you need to show up and start attracting
Web page scraping, the easy way 07 January 2018, 00.46 Web
Web page scraping, the easy way
There are many ways to extract data elements from web pages, almost all of them prettier and cooler than the method proposed here, but as we are in an hurry, let's get that data quickly, ok? Suppose we have to extract the
Scraping dynamic page content 06 January 2018, 23.57 Web
Scraping dynamic page content
One of the most common roadblocks when scraping the content of web sites is getting the full contents of the page, including JS-generated data elements (probably, the ones you are looking for). So, when using CEFSharp to scrape
Unit-testing file I/O 26 November 2017, 12.09 Testing
Unit-testing file I/O
Two good news: file I/O is unit-testable, and it is surprisingly easy to do. Let's see how it works! A software no-one asked for First, we need a piece of software that deals with files and that has to be unit-tested. The
Fixing Git pull errors in SourceTree 10 April 2017, 01.44 Software
Fixing Git pull errors in SourceTree
If you encounter the following error when pulling a repository in SourceTree: VirtualAlloc pointer is null, Win32 error 487 it is due to to the Cygwin system failing to allocate a 5 MB large chunk of memory for its heap at