I have posted over at the "News and Reviews" section of my author website the text of my invited lecture to the National Security Agency last spring about secrecy and intelligence history. (It will also be published in issue 25.6 of the journal Intelligence and National Security, which explains the funny British punctuation.)
I basically argue that the continuing, excessive secrecy surrounding Cold War signals intelligence and cryptology is bad not only for history but for intelligence itself.
You could hear the sound of one hand clapping at the end of my talk.
