There are two levels of Microsoft PowerPoint password protection, one to open the presentation and one to enable making changes to presentation. Let's check both of them.
PIPA team working on a fingerprint authentication for basically anything. Take a look at this promising project that still needs your funding to go into the production.
If you want to boost up online presence for your brand, company or product, I recommend you to create a Facebook page. I will show you how to create one and how to get started.
