EKCD - Encrypted Crash Dumps in FreeBSD

Some time ago, I was describing how to configure networking crash dumps. In that post, I mentioned that there is also the possibility to encrypt crash dumps. Today we will look into this functionality. Initially, it was implemented during Google Summer of Code 2013 by my friend Konrad Witaszczyk, who made it available in FreeBSD 12. If you can understand Polish, you can also look into his presentation on BSD-PL on which he gave a comprehensive review of all kernel crash dumps features.