The 1944 Bletchley Park Cryptographic DictionaryPage 6 |
Tony Sale's Codes and Ciphers |
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BASIC BOOK :
BASIC WHEEL ORDER :
BEAUFORT :
BEAUFORT SUBTRACTOR :
BEAUFORT SYSTEM :
2. (in the case of periodic or running key substitution on plain language by means of a Vigenere square). A system of enciphering in which either (i) the plain Language letter is found at the beginning of a line (or top of a column), the key-letter in the square, and the cipher letter at the top of the corresponding column (or end of corresponding line), or (2) the key-letter is found at the beginning of a line (or top of a column), the plain language letter in the square and the cipher letter at the top of the corresponding column (or end of corresponding line). The processes involved in the two systems can be stated in equations as follows;
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