A cipher, on the other hand, is a message in which letters or symbols replace the actual letters in the message. Every cipher has a "key"—information used to decipher a message. Some ciphers ...

An amateur codebreaker in Massachusetts claims to have cracked a mysterious cipher used by the infamous "Zodiac Killer," possibly revealing the name of the serial killer whose true identity has ...

King Charles III's royal cipher was unveiled on Monday, Sept. 26, revealing the monogram for the United Kingdom's new monarch.. The king's cipher is a monogram consisting of his first name initial ...