Hebern: 6th Problem

Munitions Buildings, Washington D.C.

Signal Intelligence Service

February 22th, 1931

My dear students,

Here a new problem. The topic is still 1812 war. I
have added a new rotor in the fifth position (the
fast rotor). To help you, I give you a couple plain
and cipher text. After discovering the wiring of
the new rotor and the key you will be able to
decipher the second message. The positions of the
rotors are known.

W. F. Friedman

1) First Message – Message key: BATTLES

– Cryptogram

AQRBC YYIAJ BSPMP IHBMU RDUDJ QKHDN NIWPH BEQNH HJHMC EDFQG

MHSGG AVDEE GUONX USYHX BGLFX SLEKC IELCZ MEDWP TVWNW JLYHF

QNXMW SAEZS CILJB OYVEH EXUZE BGMIC SIHVB OQPYD PPFCS FYYUU

MLMFA OXKQY GTRTI LPJEJ KUFTT FVLRA BLKRY HJMOJ YYYXV XXCBR

ETUNT OSCME BZGNE CZBQA LPNSM CYTCX JVCDB QJVGR VWDLM VVMFJ

ATSPX GPWXH EFQUC LAXSS WFJXD SXUMF BFYCH TCAWT VIRKU TGUZZ

BNREP RIZPP BDDPC QGKJV KDWJV KRFJK EKVEN MWFZD GLBTU VUWKE

PPVJF FGGYG BXAUK CZVNU ICNZE MIBUJ RAHFW LJWYS CESCW VQETV

TEOOP NYMUI PARDS SSIYS ESXOK CRAET RMIGA QWQCT TFPYX DSWKA

MLAEW LZGJY VCHYG VREPY CYNJQ UEXYZ UTEMO JJBKK IDMQA BZZLR

XSEPF OUGMX NKXIY TF

– Plaintext

ATTHE BEGIN NINGO FTHEW ARCOM MATHE UNITE DSTAT ESATT EMPTE

DTOIN VADET HENOR THAME RICAN COLON IESCO MMABU TWASR EPULS

EDCOM MAAND LOSTT HECIT YOFDE TROIT STOPV ARIOU SBATT LESTO

OKPLA CEINT HEGRE ATLAK ESREG IONST OPTHE FIRST AMERI CANFA

ILURE SCOMM ADUET OUNPR EPARE DNESS ANDLA CKOFA UTHOR ITYCO

MMALE DTOTH EDISM ISSAL OFWIL LIAME USTIS ASSEC RETAR YOFWA

ROFTH EUNIT EDSTA TESST OPHIS SUCCE SSORJ OHNAR MSTRO NGJRD

EVELO PEDAL ATEON EHEIG HTONE THREE STRAT EGYTO CAPTU REMON

TREAL STOPB UTHIS PROJE CTWAS THWAR TEDBY LOGIS TICSC OMMAC

ONFLI CTSBE TWEEN ARMYC OMMAN DERSC OMMAA NDTHE INEXP ERIEN

CEOFT HETRO OPSST OP

2) Second Message - Message key: INVADES

AISCH DNCGS KFZON LVTRV TPCHP CPMYG BQRAG HBGSI MBVZP VVVQA

JHSPL ZGALS UOLFE KXNRS ITBFY OZFOO MLKSC NQOFL PTESV BQTEA

AGOKS BDXMU FWDHR HYJJJ CHJPA GJFRB JRLKT TGXMA TEBUT FZNCP

RJRGB VSATG OBADH BTVNA SOPVA YWPU