For Whose Eyes Only? Cryptanalysis and Frequency Analysis

Cryptanalysis, the art of breaking codes, has proven to be a combat multiplier throughout history. By reading encrypted enemy message traffic, commanders often gain immediate intelligence on the enemy's disposition, strengths and intent. During World War II, many allied successes were attributed to the advantages gained by cracking both the German Enigma and Japanese PURPLE cipher systems. Further advances in the field of cryptanalysis will likewise give future American commanders a distinct advantage on the modern battlefield.