TheCodeBreakers
same identifying words, they received responses from several people who
turned out to be Red agents. Eventually a ring that operated in five cities
was broken up and four Communist satellite diplomats declared persona
non grata.
The most catastrophic instance of the eggshell ciphers of local
Communists took place in Iran. On the night of
August 16, 1954, Iranian security police arrested Ali Ab-basi, a former
Army captain who had come under suspicion because of his activities in
the Red Tudeh party. In the suitcase he was carrying as he came out of a
house in Teheran, they found a complete plan of Shah Mohammed Reza
Pahlevi's summer palace, showing guard posts and the number of men
stationed at each, top-secret documents from Army files, reports on the
disposition of artillery along Iran's Russian border, two notebooks in
what were obviously cipher, and another with page after page of what
appeared to be trigonometric equations, replete with the Greek letters
annaabi.ee 
