over the entire period 1940-41. They
cover the work of the entire unit known as OP-20-GY, the Navy cryptanalytic
office in Washington, and also report on the progress of the Navy
decryption units in Hawaii and Cavite. They show unambiguously that when

You spent lots of time and energy to post long usenet messages,which I
appreciate,but you most of the times forget a couple of words long small
details.

Lets start with famous hard (!)to break JN25 codes.
1)They are not hard to break,they are actually 19th Century type codes that
somehow apperared in 20th century.
2)A very identical coding system was introduced in US in 1898 for Navy and Army
and and abondoned in 1917 because it was insecure.
3)It has dictionary of 33,333 words and phrases each given as a five figure
number and these were added to random numbers contained in a 2nd code book
4)The dictionary was changed only once before Pearl Harbor on Dec 1,1940.
But random book was changed in every 3 to 6 months.
5)The Japanase blundered away the Code when they introduced JN25B by continuing
to use the random table books that have been solved by the allies,for two more
months.That was the equivalent of reconstructing the exposed dictionary.US
recovered the whole thing immediately.
So if you know JB25B inroduction date,you also know when allies cracked the
code basically.
Just for the record,in 1994 NSA published that JN25B code was completely
cracked in December 1940.
They knew that many knew that and they finally admitted.
6)In January 1941,US gave Britain two JN25B note books with keys
7)Whole Pearl Harbor schema was based on this code.
8)Between Sep1 and Pearl Harbor attack US intercepted total 26581 (acc.to NSA)
JN25N coded messages.
9)Churchill wrote "from the end of 1940 Americans had pierced vital Japanase
ciphers and were decoding large numbers of Japanase MILITARY and diplomatic
messages" GRAND ALLIANCE page 598

Hard to break JN25B code is an urban legend created in Washington D.C.to cover
treason.

tinnett simply ignores the IJN code book upgrade of December
1940 in order to make his book work. That is the blinding of
allied intelligence after making good progress into the initial code
book "A" (hence the classification

And you simply ignore that Japanase actually blundered away the JN25B code when
they continued to use random table books for two more months after the
introduction of JN25B.
It was one biggest blunders of WWII.

No one can launch an unexpected attack on the US, it sees
and knows all, I must ask the US where my favourite pen has ende

Let me formulate differently,there were no intel gaps in 1941,there were also
no intel gaps in 2001.

"He who controls the past ,controls the future,he who controls the
present,controls the past" Orwell.

I think the quote from Orwell explains why some do not like idea of reopening
of Ft.Sumter,Maine and Pearl Harbor cases.