There is a very interesting article written by R.J Hanyok which appeared in the Dec 2006, issue of World War II magazine titled "Blinded by the Rising Sun: Japanese Radio Deception Before Pearl Harbor"
Thanks. I have read that one. Hanyok has written several articles that I have found useful in the past. He also wrote “Eavesdropping on Hell: Historical Guide to Western Communications Intelligence and Holocaust, 19391945” which is an analysis of Allied code breaking in reference to German messages concerning the Holocaust. I haven’t read this yet, but I understand it is pretty interesting.