In early June 2004, “news reports in the New York Times based on leaks from U.S. intelligence sources indicated that in mid-April [2004], [Iraqi National Congress leader Ahmed] Chalabi himself had told a Baghdad station chief of MOIS [Iran’s Ministry of Intelligence and Security] that NSA [National Security Agency] had broken the codes of the Iranian intelligence service. Perhaps not believing Chalabi, the Iranian official reportedly radioed a message to Tehran with the substance of Chalabi’s information using the code that NSA had broken. According to the news reports, the Iranians immediately changed their codes, and in a stroke eliminated NSA’s best source of information about what was going on inside Iran.” [The 15th of the month used for date sorting purposes only.]
– Matthew M. Aid, The Secret Sentry, Page 270