WPA is WiFi Protected Access - it's the most common method of encryption used to secure a wireless network. If you have a laptop or smartphone and you're trying to connect to a WiFi network, you'll usually need to enter a WPA key (or password) in order to connect to it.
In the live-action adaptations by Sir Peter Jackson, Sauron is portrayed by Benedict Cumberbatch in The Hobbit trilogy (who also portrays Smaug in the same trilogy) and was played by Sala Baker and voiced by Alan Howard in The Lord of the Rings trilogy.
Another difference was that The Shadow's alter ego was Lamont Cranston, though fans knew otherwise that he was really Kent Allard. The radio Lamont was given a leading lady, named Margo Lane (played by Agnes Moorehead), who knew the true identity of The Shadow. The Lamont in the pulp had none; in fact Margo didn't appear in the pulps until a few years later. Nevertheless, the show proved just as popular as the pulp series.