| However, the key to success was to switch from plain text to enciphered text as well as frequency-hopping mode. |
| Allied codebreakers read much enciphered German message traffic, especially that encrypted with the Enigma machine. |
| Here the message is enciphered word by word, where the rule for the encryption of each word is determined by its position in the message. |
| Roughly six months later, when the testing process is completed, the identities of acceptable donors are enciphered. |
| I seized what I hoped were most of the enciphered messages, the radio crystals, and as many of the cipher books as I could reach. |
