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Lorenz cipher

[Back] The Lorenz SZ40, SZ42A and SZ42B rotor stream cipher machines were created by C. Lorenz AG used in World War II. SZ defines Schlüsselzusatz which is "cipher attachment" and used a Vernam stream cipher.

Message

Result

Note "[%"] is '\n' and "[^]" is '\r'.

Examples

The following are Vigenère ciphers:

  • Hello: . Try

Outline

The first Lorenz Cipher Machine contained 12 wheels, which had settings of a 0 or a 1. Cipher letters are created by converting them to a five-digit binary number, and then combining them together using an XOR operation. The first few codes are:

0     1   2     3    4    5    6    7   8     9
'*' 'E' '\n'  'A'  ' '  'S'  'I'  'U' '\r'   'D'

10   11   12  13  14  15  16  17  18  19
'R'  'J' 'N' 'F' 'C' 'K' 'T' 'Z' 'L'  'W'

20   21  22   23   24   25   26   27   28   29
'H' 'Y'  'P'  'Q'  'O'  'B'  'G'  ''  'M'  'X',

The plaintext of "INKWELL" then maps to [6, 12, 15, 19, 1, 18, 18]. In the following the cipher text is "%KOA*E%" and where "%" identifies a new line.

------------------------------
Plaintext: INKWELL
Baudot Code: [6, 12, 15, 19, 1, 18, 18]
Ciphertext: "%KOA*E%"
Ciphertext ordinals: [2, 15, 24, 3, 0, 1, 2]
Decrypted: INKWELL
--- K Wheels ---
State:7; Size:41; Wheel:[1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1]
State:7; Size:31; Wheel:[1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1]
State:7; Size:29; Wheel:[0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0]
State:7; Size:26; Wheel:[0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1]
State:7; Size:23; Wheel:[1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1]
--- S Wheels ---
State:5; Size:43; Wheel:[1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0]
State:5; Size:47; Wheel:[1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0]
State:5; Size:51; Wheel:[1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1]
State:5; Size:53; Wheel:[0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0]
State:5; Size:59; Wheel:[1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0]
--- M Wheels ---
State:7; Size:61; Wheel:[1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1]
State:3; Size:37; Wheel:[1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0]

Note "[%"] is '\n' and "[^]" is '\r'.