Here's a relevant paper called Why Johnny Can't Encrypt[1], which does an excellent job of defining understanding and usability problems with encryption. It's

Here's a relevant paper called Why Johnny Can't Encrypt[1], which does an excellent job of defining understanding and usability problems with encryption. It's certainly dated, but I find that its main points are still very true today. [1] http://www.gaudior.net/alma/johnny.pdf http://www.gaudior.net/alma/johnny.pdf