The National Archives [United Kingdom]:
***Enigma provides a fascinating introduction to Britain's cryptographic secrets of the Second World War through a unique collection of contemporary documents held in The National Archives.***
Enigma coded German radio messages were intercepted and decoded at Bletchley Park throughout the Second World War. The decrypted information was known as ULTRA and provided invaluable benefits to the allied war effort.
Despite Churchill's orders at the end of the war that all evidence relating to codebreaking be destroyed, many papers, including internal histories, summaries and copies of decry... View More...