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SIGNAL SERVICE, WAR
DEPARTMENT, WASHINGTON D.C.
January 1935, the 10th,
Dear students,
To prepare you to
decipher the Swedish messages we
intercepted, I created several problems in English to train
you. The topic of the messages is the Independence war.
In the following
problem, there is no plugboard and we know
the beginning of the message (MESSAGE NUMBER ).
Remark : I have
used the B21 owned by SIS, not the
Swedish one.
Good Luck !
Frank Rowlett
TTFRI DKSTE QFVOT CTKJY SQSXQ SAFTS GMCPT KBUEV PIWVY
XECNQ
PGNYS LMTAD LRJPM XKCET DFFSW KUQKB EKAGX MCYNT XTLPY XGNDT
OKBXF IRXHR GQGWJ AYVXE FWSJR KRMUS TOACS ABJVT SIKAV CFHLU
WGKUU WXXLS RKAEW RQBPL KSKJC NFBKW XUABO QVBVD KLKCQ RFAGV
GLNMP OHMTE CSPGV DJVFJ CMKHK PBCUB CNXKJ NQOFA XPLNB XRHGU
VCQJI WLWAF XXKJH VRYFB OQDEE EWXXX
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