Yet you seem to be implying that the government is "hiding" something under the security classification. Frankly, bureacratic bumbling and institutional inertia are probably the main reason for any continuing classification. In any case, the messages pertaining to Pearl Harbor were decrypted and are available. The remainder are most likely of little interest.

Again, I am not implying they are "hiding" something. Some review of how the issue actually came up seems to be necessary. First, Jay said....

However a significant percentage of the Archives' holding is not catalogued, simply because they are understaffed and underfunded. And so cataloguing is done by priority. Important things are catalogued first, while less important things like the minutiae of Apollo have to wait. The Archives strictly does not allow research in uncatalogued material, whatever its origin. It's nothing sinister or personal; they just wouldn't be able to tell if something were missing.

My exact reply to this post was...

Yes, this is entirely correct. In fact, the National Archives and Records Administration (NARA) has long been an advocate of releasing information to the public, including decades-old documents that remain classified for no valid reason. One example that comes to mind is the refusal of the US Government to declassify any pre-Dec 7, 1941 decrypts of Japan's JN-25 code on the basis of "national security". This is an utterly ridiculous claim - a long since obsolete code, over 60 years after the war it was used in, being deemed a "threat to security"!

Where do you get the idea from the above that I am "implying" a secret Government cover-up of documents that would prove they knew about the attack before it occurred? I clearly said the security classification for long-obsolete documents was ridiculous, and also agreed with Jay's assessment that it's the sheer volume of uncatalogued documents that has hindered their release to the public.