How Encryption Works
I love learning new things, and I love when someone can take an incredibly complex concept and break it down using metaphors to make it understandable. This is probably the best explanation I’ve ever seen of how encryption works, and why prime numbers are so important to the process. Not only does it make perfect sense by the end of the video, but it does this using – of all things – paint swirls.
Here's Some Awesome 
Hey I’m the original author of this video (which was stolen and reposted from a rought draft). The actual video is HERE: http://www.youtube.com/watch?v=YEBfamv-_do (corrects some mistakes in the stolen video too)
Brit, thanks for pointing it out. I’ve swapped out the videos above. Thanks also for making the concepts understandable!