http://nguipxnkrp3qrzrlduhsatpcpwehnblzmlkc5ifiumxq4z5jlh4lwvid.onion/os_archive/os_OPSEC_357.html
Also assume that you're being keylogged if you're connected to the internet on a modern operating system (including linux and bsd) on a modern hardware machine (Anything >2005). Just operate as if that is true and weigh the implications of your typing and mouse clicks accordingly in your actions online and "Offline". Also get an airgap for anything that you wouldn't want to share publicly with your boss, spouse, grandmother, neigbour or law enforcement.