For 51 years, one of the Zodiac Killer’s puzzling codes he sent in letters to newspapers in the late 1960s and early 1970s has confounded the cryptography community, law enforcement and curious ...

Bottom line: An international team of cryptographers have managed to crack a coded message from the Zodiac Killer that has remained a mystery for more than five decades. As exciting as it is that the ...

The United States National Security Agency — the country’s premier signals intelligence organisation — recently declassified a Cold War-era document about code-breaking. The 1977 book, written by ...

In cryptography, the data in a message is encoded by multiplying it with a certain number. To decode the message the receiver must apply a second number, related to the first, called a key. But in ...

UK intelligence agency GCHQ has celebrated its centenary year by releasing emulators for famous code cipher and code breakers used in World War II. Last week, GCHQ said on Twitter that the public can ...