It's the 4th cache of a series of 5 and an additional
bonus cache. All of them are about cryptographical issues.
Cryptomaniac #1
Cryptomaniac #2 Bonusletter: F
Cryptomaniac #3 Bonusletter: N
Cryptomaniac #4
Cryptomaniac #5
Cryptomaniac #bonus
You'll find in every cache one or more letters on the first page
of the logbook, you'll need them for the bonus cache.
The first two caches of this series used some modern encryption algorithms, so let's continue with something historical.
There is no IT and/or mathematical knowledge needed to decrypt it.
Key:
UKW: B, Walzenlage: "Gamma" III IV VII
Ringstellung: PSKK
Stecker: 1/23 5/21 6/25 8/22 9/24 19/26 3/13 7/15 10/17 12/20
Spruchschlüssel: BWFI
Chiffre:
FHDS ILFJ WKOH MVQG MGOW ESBY ESPC XZLV
XRAW EQCE ZJBA NTLY EUXF PHXO GATE PCAX
URLK DBRH UMIS RYSL GWGZ OBBC FIPJ QSTG
DHXH VJAE KFSD IVYZ NRRP YIUQ YJHE LLBG
JKJB RGQU MSCR CMPZ IEEW MEDU JUVZ GLFT
TAVW YUOQ EUCC KAEN CWMO MYJF GOMW IDNT
YTHL QDOW UNYZ YDSE LFNL QUWI KBTD JHCV
IKYO FWDK KRLZ GMMW YWVU JKWT PTWB NMDC
WUIN NGRI CIGC GALX NSVX TWZC XBIW UGKR
WCLK TQDF YJRP SCZJ BOXP KGZU RINT WJWD
LIHO BSBD RMMF GRKJ KPHI LKPH GNFP POOL
XIEG HBPW WSLX UOEL ELSW QTOE WLIO HPJD
RDOS DOZM PDSP QXYB PTLU LFCX NPGQ DTHJ
VSDH XPOE OTVR JRPS BNAY GTMO BRYM ZVDI
PUUB LYHZ JWSA RVOK BRWJ BWTX PMQZ LEXL
QXIV HXFF LQOJ AEEG ZQZC EVFG QOXG UTKD
JVZE PWS