White House – Washington D.C. 9 September 1950
Signal Officer, 10:45
AM
We just received a
important message, decrypt it and transmit
it to the President as soon as possible.
Cipher clerk’s note : I hope Marshal McArthur does not start
this message with the following crib, it is a serious breach in
security and I would be obliged to report it to regulation.
From Z General Z of Z the Z Army Z
Douglas Z MacArthur Z the
Z US Army Z officer Z in Z command Z of Z all Z UN Z forces Z in
Z Korea Z
Editor's note: The
Crib is given with spaces replaced by the
letter Z in capital letters for better readability. But do not
forget that the Sigaba interprets the spaces well and
translates them internally into the letter Z. On the other
hand, if you enter a letter Z (which is indicated by a
lowercase "z"), it is translated by the letter X.
Rotor Set 87185
NR013 0910 0030 EAT
GR095 SKBCX ARTUR DBJQF QKKIW EBVDU
RHBSA RYCBD NWVEP YVRGB REVRA IIIWW QPZXE RXAPT PKDFE ITNDK
NYFEX ODRDG GFVKO XZWRB APVGL SZXLK LIARX QUZAL HDOIC ZJPIX
CNXCA YUHXZ TBXGV DKMWJ XEKPD ILNKK JVWCD JGGSA DXCZU FBYCJ
NWLTA YTIRW VVUJJ DSZRO TMCOC FIBMM QMZLI CGLHG FQDPT SZRHT
GDJYU FZYCN QTSSW YYXXL AYONV FCSBJ PYYVB QPNPP OTJOO KSQBT
QFXPF FFWTS PXAQD IVGAF FXSTH OHIWH EDQSV DMRQK HJIEU RDXGZ
EBADS GXKJM NLVEH FQYEC MIJZR PVWUO XLSVM VSLFY XDFCO IORGH
QVIYM JXHJN XOZQU DUAPH XJPWJ CFOBM HQVFG MPDOV EEWNB ABAMM
XYUVB LCQTE MDPQY FZAFU GAOXG XYWEZ LZDZO NRVIV SKBCX ARTUR