The “manual” was “discovered” by analysts at the Combating Terrorism Center, based out of the US Military Academy at West Point. Thankfully, Buzzfeed has the details, noting that the guide, created by a cybersecurity firm in Kuwait, named Cyberkov, is actually a guide for journalists and activists to protect their communications from oppressive governments. And there’s nothing particularly secret about it, as apparently it’s basically just repurposed stuff from the EFF’s website