Seizing the enigma – David Kahn Koop Online

Among the famous battles of World War II, the longest and most critical was the Battle of the Atlantic–the struggle between the American convoys bringing supplies to Britain and the German U-boats bent on severing that lifeline. No matter where else on earth conflicts raged, leaders on both sides understood that whoever won the Battle of the Atlantic would win the war. From the start, Germany had the advantage with the diabolically devised encryption machine known as Enigma. Breaking the Enigma codes becam…