Decrypt the following cipher text using cryptanalysis. Please show your working.

Question

Decrypt the following cipher text using cryptanalysis. Please show your working.

M XI X SFGZALF XF GLMJARSMFV UN EXLWARRX CYU MS MLFARASFAZ ML QAXRLMLT EUIHGFAR XLZ LAFCURO SAEGRMFV SMLEA MF MS ULA UN FYA IXML EYXQQALTA NXEAZ WV IXLV WGSMLASS URTXLMBXFMULS XLZ XEXZAIME MLSFMFGFAS XF FYA IUIALF M XI FRVMLT FU ERXEO FYMS EMHYARFAPF GSMLT EYXRXEFARMSFMES UN ALTQMSY QXLTGXTA XLZ NMLZMLT MF KGMFA EYXQQALTMLT XLZ YXRZ WGF MF MS XQQ X TUUZ QAXRLMLT HRXEFMEA NUR IA

Hints:

(a) As you know, the most frequently occurring letter in English is e. Therefore, the

first or second (or perhaps third?) most common character in the message is likely

to stand for e. Also, e is often seen in pairs (e.g., meet, fleet, speed, seen, been,

agree, etc.). Try to find a character in the ciphertext that decodes to e.

(b) The most common word in English is “the.” Use this fact to guess the characters

that stand for t and h.

(c) Decipher the rest of the message by deducing additional words.

Explanation / Answer

Keys used:

a b c d e f g h i j k l m n o p q r s t u v w x y z   
x w e z a n t y m d o q i l u h k r s f g j c p v b

That means a is mapped to x , b is mapped to w ..Use this mapping in Text and Decipher it

Cracked the Cipher

I AM A STUDENT AT UNIVERSITY OF CANBERRA WHO IS INTERESTED IN LEARNING COMPUTER AND NETWORK SECURITY SINCE IT IS ONE OF THE MAIN CHALLENGE FACED BY MANY BUSINESS ORGANIZATIONS AND ACADEMIC INSTITUTES AT THE MOMENT I AM TRYING TO CRACK THIS CIPHERTEXT USING CHARACTERISTICS OF ENGLISH LANGUAGE AND FINDING IT QUITE CHALLENGING AND HARD BUT IT IS ALL A GOOD LEARNING PRACTICE FOR ME

Thanks, let me know if there is any concern.

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