TheCodeBreakers
and American cryptanalysts were suffering nervous breakdowns to solve
the PURPLE machine, an American citizen was running his duster over
tables on which stood the intricate machines that were the vortex of this
silent struggle.
But just as the Japanese seemed not to have given serious thought to
the possibility of Robert's being a spy, so the Americans seemed to have
given no serious thought to the possibility that a spy might have been
insinuated into the Japanese embassy to ease their cryptanalytic burden.
Of course, even if they had thought about it, they might have rejected the
idea, for discovery of the spy would have meant an automatic change of
codes. The danger of this was much less if the systems were read
through cryptanalysis.
The paper codes of the Japanese consisted of folders whose four or six
pages could be opened into a single long sheet. Embassy Counselor
annaabi.ee 
