Cryptography has become popular in the post-Edward Snowden era. Everyone seems to be worried about being spied upon and is looking for ways to avoid it. While the majority of users likely have nothing to hide, it's still a creepy feeling to know that someone can, and possibly is, checking what you say and do.
There has been a lot of talk about adding backdoors, mostly from those who want to spy and those who simply don't understand the technology. The latest of this is currently taking place in New York.