"So little was known in this country of codes and ciphers when the United States entered ... She took on a secondary position as a Nazi spy hunter, monitoring communications between the German ...

A cipher is a code used to protect information that is being stored or communicated, so that only people who are allowed to can access it. With this fun challenge, brought to you in partnership ...

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 ...