Read the footnote. Copied here: "The British government insisted upon this silence because it has given the thousands of Enigma machines that it had gathered u

Read the footnote. Copied here: "The British government insisted upon this silence because it has given the thousands of Enigma machines that it had gathered up after the end of the war to its former colonies as they gained independence and needed secure systems of communication." p 979 The Codebreakers by David Kahn ↩