Introduction: A revolutionary cipher -- Cryptology before 1500: a bit of magic -- The black chambers: 1500-1776 -- Crypto goes to war: the American Revolution -- Crypto goes to war: the American Civil ...

One of the CIA’s most enduring puzzles is about to go under the hammer. Jim Sanborn, creator of the Kryptos sculpture at the agency’s Langley-based headquarters, plans to sell the solution to the ...

Letters released by GCHQ have revealed how wartime codebreakers were told their jobs were over after VJ Day. The intelligence agency has published historic documents to mark the 80th anniversary of ...

Letters released by GCHQ have revealed how wartime codebreakers were granted holiday and told their jobs were over after VJ Day. The intelligence agency has published historic documents to mark the ...

The Ukrainian leader’s blunt comments risk angering President Trump, who has made a peace deal between Ukraine and Russia one of his signature foreign policy goals. By Constant Méheut Reporting from ...

GCHQ staff were bound by the Official Secrets Act and were unable to talk about their secret work they carried out during the war. Letters released by GCHQ have revealed how wartime codebreakers were ...

Newly released letters from GCHQ have shed light on the immediate aftermath of the Second World War for Britain's top secret codebreakers. They reveal how staff were granted unexpected holidays and ...