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 ...

A 50-year-old mystery was recently solved when a group of intellectuals decoded a message allegedly sent by the infamous Zodiac killer. The message was sent to the San Francisco Chronicle in November ...

You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

Here's your chance to crack ciphers similar to those Bletchley Park's codebreakers faced during World War II. Below, we present three ciphers of different levels of difficulty, from easiest to most ...