world war two

German naval leaders generally remained confident in the Enigma system throughout the war. Nevertheless, the security of their codes and ciphers was periodically brought into question by those fighting on the warfronts. From the conning tower perspective, Allied naval and air power seemed increasingly overwhelming. In some cases, U-boat sailors were convinced that their codes and ciphers were compromised when Allied forces suddenly appeared in the remotest of locations in the vastness of the open …

…