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Which displacement produces largest number of coincidences

Assignment Help Computer Network Security
Reference no: EM131216498

The following ciphertext has been obtained by Vigenere encryption.

ocwyikoooniwugpmxwktzdwgtssayjzwyemdlbnqaaavsuwdvbrflauplooubfgq
hgcscmgzlatoedcsdeidpbhtmuovpiekifpimfnoamvlpqfxejsmxmpgkccaykwfz
pyuavtelwhrhmwkbbvgtguvtefjlodfefkvpxsgrsorvgtajbsauhzrzalkwuow
hgedefnswmrciwcpaaavogpdnfpktdbalsisurlnpsjyeatcuceesohhdarkhwot
ikbroqrdfmzghgucebvgwcdqxgpbgqwlpbdaylooqdmuhbdqgmyweuik

(a) Use displacements of 5 and 6. Which displacement produces the largest number of coincidences?

(b) Find the key.

(c) Find the plaintext.

Note: You can use tools available on the internet, but you need to indicate them and how you used them. Or you can write your own programs.

Reference no: EM131216498

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