SAN FRANCISCO (KRON/AP) – A coded letter mailed to a San Francisco newspaper by the Zodiac Killer in 1969 has been deciphered by a team of amateur sleuths from the United States, Australia, and ...

The intriguing world of cryptography has its roots in non-standard hieroglyphics, which were discovered on the walls of an Egyptian tomb in 1900 BC. In India, around 400 BC, “substitution cipher” ...

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 ...

How does a cipher and code, used by a failed politician, dropped into the middle of a trial for treason in 1807, involving then-president Thomas Jefferson and Chief Justice John Marshall, lead to a ...

In 1931, Herbert O. Yardley published a tell-all book about his experiences leading a covert government agency called the Cipher Bureau Peter Zablocki - History Correspondent Herbert O. Yardley ...