Post by hobbit601 on Jun 12, 2019 4:48:52 GMT
I was trying to gain some insight as to the format and procedure(s) being used to encrypt Wehrmacht messages prior to May 1940, and thought that this may be of general interest to others. Noting on May 1, the Wehrmacht discontinued duplicate keys and duplicate encryption, which blacked-out decoding of messages by the Polish Cipher Bureau.
I’ve found two formats that may have been in use prior to May 1940 (there are probably others):
Example from September 21, 1938
2109 – 1750 – 3 TLE – FRXFRX – 1Tl – 172 =
HCALN UQKRQ AXPWT WUQTZ KFXZO MJFOY RHYZW VBXYS IWMMV WBLEB DMWUW BTVHM RFLKS DCCEX IYPAH RMPZI OVBBR VLNHZ UPOSY EIPWJ TUGYO SLAOX RHKVC HQOSV DTRBP DJEUK SBBXH TYGVH GFICA CVGUV OQFAQ WBKXZ JSQJF ZPEVJ RO –
Settings: B, II, I, III, ZWD (EZ), (BL), (XP), (WR), (IU), (VM), (JO)
Date: 21/09; Time: 17:50; 3 parts; Ground setting: FRX; part 1, is 172 characters.
Setting the rotors to ground, HCALN U becomes the message key AGI AGI. Setting to the rotors to AGI, the encrypted message begins at QKRQ. However, the third group of characters, AXPWT, is actually the daily Kenngruppe, and is ignored in decryption. The message continues with WUQTZ.
The message is in German: AUFBE FEHLD… you can decode the rest if you wish.
Source and further reading: Die Chiffriermaschine Enigma, Heinz Ulbricht, pages 27-28. d-nb.info/974568244/34
(Excellent… I wish this was in English )
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The second example is a little different,
0020 0020 = 171 171 = ERG ERG = AYDJM UMYXI MYMZA XOZBC WGZFI GIMWX QWGAK OHLIC KJOHF JFVNA VAUHA WSXEI LABDJ UBEUA QSAMW JWGUP OJZNL BCDDA VBXBQ OPTYR NZTPU PABQB OJDJO XRJKM GLYJL QPBAQ XAIAV XOGQH KTTOP HZROK UMSSJ LONIN RGUBQ FAJPP D
Settings: B, V, I, IV, KSH (BF), (DV), (EJ), (GM), (IY), (KP), (LZ), (NX), (OQ), (TW)
I make an assumption AYDJM is the daily Kenngruppe. UMYXI M decodes to the message key OLE OLE. The encrypted message text begins with YMZA.
The message is also in German: TAETI GKEIT… you can decode the rest if you wish.
Source and further reading: The Norrköping Enigma messages, Dan Girard
enigma.hoerenberg.com/index.php?cat=Norrk%C3%B6ping%20messages
Please post any additional format examples if known.
I’ve found two formats that may have been in use prior to May 1940 (there are probably others):
Example from September 21, 1938
2109 – 1750 – 3 TLE – FRXFRX – 1Tl – 172 =
HCALN UQKRQ AXPWT WUQTZ KFXZO MJFOY RHYZW VBXYS IWMMV WBLEB DMWUW BTVHM RFLKS DCCEX IYPAH RMPZI OVBBR VLNHZ UPOSY EIPWJ TUGYO SLAOX RHKVC HQOSV DTRBP DJEUK SBBXH TYGVH GFICA CVGUV OQFAQ WBKXZ JSQJF ZPEVJ RO –
Settings: B, II, I, III, ZWD (EZ), (BL), (XP), (WR), (IU), (VM), (JO)
Date: 21/09; Time: 17:50; 3 parts; Ground setting: FRX; part 1, is 172 characters.
Setting the rotors to ground, HCALN U becomes the message key AGI AGI. Setting to the rotors to AGI, the encrypted message begins at QKRQ. However, the third group of characters, AXPWT, is actually the daily Kenngruppe, and is ignored in decryption. The message continues with WUQTZ.
The message is in German: AUFBE FEHLD… you can decode the rest if you wish.
Source and further reading: Die Chiffriermaschine Enigma, Heinz Ulbricht, pages 27-28. d-nb.info/974568244/34
(Excellent… I wish this was in English )
----------------------
The second example is a little different,
0020 0020 = 171 171 = ERG ERG = AYDJM UMYXI MYMZA XOZBC WGZFI GIMWX QWGAK OHLIC KJOHF JFVNA VAUHA WSXEI LABDJ UBEUA QSAMW JWGUP OJZNL BCDDA VBXBQ OPTYR NZTPU PABQB OJDJO XRJKM GLYJL QPBAQ XAIAV XOGQH KTTOP HZROK UMSSJ LONIN RGUBQ FAJPP D
Settings: B, V, I, IV, KSH (BF), (DV), (EJ), (GM), (IY), (KP), (LZ), (NX), (OQ), (TW)
I make an assumption AYDJM is the daily Kenngruppe. UMYXI M decodes to the message key OLE OLE. The encrypted message text begins with YMZA.
The message is also in German: TAETI GKEIT… you can decode the rest if you wish.
Source and further reading: The Norrköping Enigma messages, Dan Girard
enigma.hoerenberg.com/index.php?cat=Norrk%C3%B6ping%20messages
Please post any additional format examples if known.