Roger Johnston was the head of the Vulnerability Assessment Team at two of the United States National Labs (Los Alamos and Argonne) for many years. He has a PhD in Physics and has written and lectured extensively on security.
Why go through your entire security, law enforcement, or intelligence career being confused? Here, at last, is an 850+ word dictionary to clarify all that confusing security jargon, by giving you the TRUE meaning of various terms, never mind what the experts think! This book can be ordered from Amazon.