P1030670 Kenngruppen
By Michael Hörenberg
Message P1030670 is encoded with the naval "Reservehandverfahren" cipher system. But how do we know this? Let's take a look at it. The serial number (Uhrzeitgruppe) 1224/62 of this particular message is mentioned in two other U534 messages. Both messages P1030689 and P1030713 have a similar content. They tell us, that 1224/62 is encoded with RHV. Message P1030689 also copy the content of P1030670. Additionally P1030670 does not decode with the Enigma daily key of 01. May 1945 (Key Potsdam).
 Envelope "Quelle"But there's another way to check whether P1030670 is RHV: The Kenngruppen (indicator groups). To do this, we need the original secrect cipher documents from 1945! The procedure is also described here. |
 substitution table selection chart for indicator groups "Bruno" May 1945We need: - The Tauschtafelplan für Kenngruppen (substitution table selection chart for indicator groups) - The Tauschtafeln (a set of bigram substitution tables for "Kenngruppen" e.g. "Quelle") - The Kenngruppenbuch (K-Book) - The Zuteilungsliste für Kenngruppen (indicator group selection chart) |
 Tauschtafel "Quelle" A (1)First we decode the indicator group (Kenngruppe) QQGK ECLZ with the bigram substitution table A (1) and table A (2) from "Quelle". QQ --> MS GK --> ZU EC --> PD LZ --> TN |
 Tauschtafel "Quelle" A (2)(M) Z P T Schlüsselkenngruppe S U D (N) Verfahrenkenngruppe |
 KBook GruppenlisteIn part 2 of the K-Book, Gruppenliste of the Kenngruppenbuch (list of groups) we find that Z P T equals to 211 16. RHV and the number 211 of the "Schlüsselkenngruppe" is also mentioned on the original cipher form. |
 Zuteilungsliste KenngruppenThe Zuteilungsliste für Kenngruppen (indicator group selection chart) tells us: 201 - 250 is RHV ! |