" Most of the codebreakers returned to their civilian lives, sworn to secrecy, unable to reveal their pivotal role in the Allied war effort. While those who had fought conventional battles could talk of their heroic achievements, those who had fought intellectual battles of no less significance had to endure the embarrassment of having to evade questions about their wartime activities. "

― Simon Singh , The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography