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Post by mauser on Dec 11, 2017 20:21:33 GMT
You are cruising on the surface in the Biscay Bay in QU (Quadrat) BF 4533 on the 11th of December when your radioman alerts you to a message received on 14.320 MHz.
ß BDUUU TTT UUUONEONEONE
FFG 1945/11 010 46
EVWM XAQM BKNW ASDC NVFB OUHF ZZAA DPGU VGHE AAJG
LVNG CWLK VZIS ZJNE MPJY JKHU EYVO LBWP EBTT TNUV
LSPL ICKO RJCC VTOE XHTP YVOY FSKF ISQR LUHG LGYV
NGDA KLPU UCQZ IHXD DWPB VIHZ UKYH GSQF SYIK ARUT
EYKI KGIQ QVXP REHM EVWM XAQM
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Post by ZZ9pZa on Dec 16, 2017 22:19:52 GMT
UUUEINSEINSEINS AN AN BDUUU
ETA 2318/11 001 09
EVWM XAQM FITT OQVP JOOE PRMI FUPH EVWM XAQM
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Post by Arnaud on Dec 19, 2017 10:24:57 GMT
Hey, I found this in the Enigma General Procedure: "In the Fleet and Acknowledgment Procedures, addresses are to be put at the beginning of the message text and to be enciphered along with it."
Since this is an acknowledgment, I did encrypt the adress (this is wierd, you need to dercypt all messages, just to find that most of them are not intended for you...must have misunderstood).
I have not changed the day key so people don't have to fiddle too much with the settings. Actually I find that changing all the settings at every message in a thread is tiresome and not really practical. I like it when people answer with the same settings as the opening message and maybe just change the indicator group.
HSN 1119/11 003 72
EVWM XAQM FQXY KXLH LWDY OYDO XUBA GPWK DEUU MEWS
RGCG HLVQ SPHX ZCSI XMWU DVUY PZAF ZVSM FJWW KGAP
ANLR BMYH AAHG LVYF SZRB QKSZ CDXF VLHM NFMG FEGS
RXBJ JSZU LHYK WMVG GYUP VZHC VYFM FRND OHDI GQGF
MAPK PXUK RCRS UKUP POWJ MLZI CRDJ ZVAG TMDR XHFB
CIOO IDGO DJKV VGJL WKLS YRKZ FTVZ CQLJ OWSH VZAF
LRCI INVQ NRVX SVPE XGOH PGCK TFUE LOCY AABC ERTF
EVWM XAQM
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Post by mauser on Dec 21, 2017 1:34:30 GMT
UUUEINSEINSEINS AN AN BDUUU ETA 2318/11 001 09 EVWM XAQM FITT OQVP JOOE PRMI FUPH EVWM XAQM Correct answer. However, re-using the same message key for your reply or any reply for that matter is incorrect communications security protocol. |
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Post by mauser on Dec 21, 2017 1:49:19 GMT
I wouldn't change the key unless you decide to change the day. Otherwise all that is needed is a new set of indicator groups (message key) at the beginning and end.
Also, remember that YOU are out at sea are replying to the fleet, therefore encrypting is required. For you the U-boat, section 16 of the General Procedure applies, whereas the General Procedure applies to the initiator of the message thread. The only messages you are likely going to decrypt are those from BdU unless BdU instructs you to make radio contact with another boat. And BdU will list addressees.
Look in the DropBox and you will now find Marinefunknameliste_M.Dv.Nr.82-1.pdf. This will be the Radio Name List mentioned in section 15 of the General Procedure.
Mauser sends.
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