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Cipher w CTAK and substitution alphabet; Same alphabet used in previous message.
Topic Started: May 17 2015, 02:09 PM (266 Views)
JOE.TEKK1
Elite member
[ *  *  *  *  * ]

A Message for Zetaboards Crypto. ** NOTE: This message is related to :

"Cipher w ctak" post ;-)

The context is the communications system for an Executive Protection Detail for a corporation.

Cipher Text Autokey/Cipher Feedback is used.



UCJJC IMRLI FBGDB HFUD BIOBH PPOOI KOHJC JPEBB BDFGE VEDRZ MEVZF



RQFHE JHXBJ SBGCI HNQWD XGACC AGTK JVBW



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Plain message: YOU MUST GO TO GREENWICH (CONNECTICUT) AND WESTPORT TO

CHECK HOUSES CORAL AND JADE X HOUSE QUARTZ IS BEING RENOVATED X END .


We are using an alphabet where A=11, Z=36. The key is 12 characters, expanded on the

6 character key of “ QUICHE ” ; Q=VD, U=OW, I=HP, C=SA , H=WE, E=GO , then take

the 2nd and 4th digraphs again ( OW and SA ) as key letters, then use the W. Then key

of “HLQUAESWUYZQQUSWU . “ .

What would the message be if we used the 6-letter word of " PAELLA" as Key?


--end--
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