The following ciphertext was encrypted using a Vigen`ere cipher. 1  Guess the period of the key. Justify your guess using the Kasiski test and the index of coincidence method. 2 Determine the encryption key and retrieve the original message.

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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The following ciphertext was encrypted using a Vigen`ere cipher.

1  Guess the period of the key. Justify your guess using the
Kasiski test and the index of coincidence method.
2 Determine the encryption key and retrieve the original message.

PDJVJ
LFCJW ZQLGR EVMUV
ZOWID AJZPZ DWEMU QLGGI QZZME NZPJM
YXSMW IHQQP DBWIE KMSFB
GIQWW IJWZE
YMAIC
TJRRB MIYQS KPDJV
ҮНQQP ҮMA С ОЈХEW
WZNFV QZTQO QXGZC WERQS KZVQC
LAHIY
LNRRM AICQR TCWAM YOUEE PDSFS
SSHGT
YLPMS
HZNYL PRTYC VJCMC
YXSQX
LLIWE
WYLPR TCLVI
KWWWC ZNYLP
KQMXJ
Transcribed Image Text:PDJVJ LFCJW ZQLGR EVMUV ZOWID AJZPZ DWEMU QLGGI QZZME NZPJM YXSMW IHQQP DBWIE KMSFB GIQWW IJWZE YMAIC TJRRB MIYQS KPDJV ҮНQQP ҮMA С ОЈХEW WZNFV QZTQO QXGZC WERQS KZVQC LAHIY LNRRM AICQR TCWAM YOUEE PDSFS SSHGT YLPMS HZNYL PRTYC VJCMC YXSQX LLIWE WYLPR TCLVI KWWWC ZNYLP KQMXJ
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