Last week I gave a small workshop during the lunch hour (the famous Whitesmith’s “Lunch’n Learn”) about openPGP. It only covered the most basic aspects so that non-technical people could be introduced to this tool, something that can be very useful when someone is sharing or working with sensitive information (either personal or work related).
It covers aspects such as key pair generation, key revocation, exportation/importation of keys and obviously encryption and decryption of documents. Most of the examples use a command line interface but there are several frontends available which are straightforward to use once you are familiarized with the concepts. Perhaps it can also be useful to you (somehow) so here is the link to the presentation, if you have any question feel free to ask in the comments section.