A single leaked hint exposed the CIA’s most puzzling code. But dozens of the world’s toughest ciphers are still waiting to be ...

The 35-year-old saga of Kryptos, an enigmatic sculpture containing four encrypted messages outside the CIA headquarters, just ...

How does one crack the world’s most famous code? The breakthroughs on Kryptos provide a guided tour through the cat and mouse game between code makers and code breakers that has defined information ...

We may earn a commission from links on this page. Readers Steven K., Eamon and Chris A. send this one in late, a screenshot from Chapter 6 in Dead Space that will help the rest of us decode what the ...

This brief message, which former NASA administrator George Low named ‘The Martian Cipher’, was intercepted in 1969. It took the space agency almost 50 years to decode it. This deciphering is arguably ...

The cipher controversy is back. The Intercept, an American media outlet known for unearthing secret documents, has claimed to have got hold of the text of the cipher that was at the centre of Imran ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher. Its ...

This was one of the most secure hand ciphers used in the Second World War. It was used by both the Allies and the Axis, and served both well. Its main weakness was that if the attacker intercepted two ...