Question
The following ciphertext was encrypted with a22 Hill cipher: HOOYH BTXGW KMVDH KKBMC HOHOM TMIJN FBCPY PTRAW SCTCK XEZHO APUCT MGYKS MTMCT CETQF ZTDJC YNVFW
The following ciphertext was encrypted with a22 Hill cipher:
HOOYH BTXGW KMVDH KKBMC HOHOM TMIJN
FBCPY PTRAW SCTCK XEZHO APUCT MGYKS
MTMCT CETQF ZTDJC YNVFW PPBMM GUURG
PPGSX OEZHO MTIWY IQDPC CMUBH OGEXN
TCQID QPPPP QBIGK AZEYP HOAPE BEKWX
HOCUW XKBAP MIMRI JMTTL UEYPH OIJIL
UDNZE IHNZR HOWXNA
quick count shows that the most common bi-grams occurring in this ciphertext are HO(occur-ring ten times),PP(occurring four times), and MT(occurring four times).
(a) Find the key of the Hill cipher that was used(your answer should be a 22 matrix mod26). Explain how you got your answer.
(b) Decode the message
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