What disturbs me most about the Petraeus scandal is that the chief of the nation's Central Intelligence Agency didn't even have the minimal amount of basic "intelligence" to understand or use common encryption techniques. There's no excuse for that. Spies should know how to encrypt their communications, and the boss of the spies should be smarter than your average code monkey who routinely encrypts all his/her email, regardless of its nature (mundane server log reports or confidential security studies). Clearly, someone that stupid was not qualified to run the CIA, much less command the armed forces of the United States.