Every cipher has a "key"—information used to decipher a message. Some ciphers have simple keys, others, complex ones. The key for a cipher used by Augustus Caesar, some 2,000 years ago ...

Some historians claim that the Enigma codebreaking was the single greatest Allied win, shortened the war, and possibly even ...

“Beep codes” vary a bit from BIOS to BIOS, but in general one quick beep means that everything is working fine. If you hear two long beeps followed by three short ones, that could mean that ...