c programme

Your task is to design automated solvers for the shift and Vigen`ere ciphers. You must use C as the underlying programming language, in order to get prepared for the following assignments. Each solver should be completely automated, i.e., upon reading a text file containing the target ciphertext (given as command-line argument), it should print the encryption key and the decrypted plaintext without any user interaction. Test your code on the following ciphertexts, and answer these questions:

(a) What is the key of the cipher?

(b) What is the decrypted plaintext?

Ciphertext 1 (shift cipher) ODKBFAXASKBDQEQZFEMPURRUOGXFKZAFRAGZPUZZADYMXMOMPQYUOPUEOUBXUZQEFTQZQQPRADFTQBDABQDUZFQDM OFUAZARODKBFASDMBTKMZPODKBFMZMXKEUEFTUEMDUEQEAGFARFTQRMOFFTMFUZFTQMNEQZOQARDQMXOAYYGZUOMF UAZEDQCGUDQYQZFEUFUEQMEKFABDABAEQMEKEFQYFTMFMBBQMDEGZNDQMWMNXQYMZKMOMPQYUOPQEUSZEMDQEAOAY BXQJFTMFFTQIAGXPNQODKBFMZMXKEFPAQEZAFWZAIITQDQFAEFMDFQJBAEUZSRXMIEUZFTQEQPQEUSZEUERMDTMDP QDFTMZPQEUSZUZSFTQYUZFTQRUDEFBXMOQFTQDQEGXFUEFTMFFTQOAYBQFUFUHQBDAOQEEITUOTUEAZQEFDAZSYAF UHMFUAZUZMOMPQYUODQEQMDOTOMZZAFFMWQTAXP

Ciphertext 2 (Vigen`ere cipher) YYCCIIDCGRBBVVPTLHKEAGRDVFEGTDJPUPLXWJRTFSTXGCZWPKFTEOVVQTOSPKGTLOPUCPKZAVGVAHKVQIASPRRXH BCCQTVITZRNTUGEANTAGIGRTGQWDXVWCCAGRDVFEGTDJZADKUCEKPWSUVTTKONRRIXARKQIHEWRQWBHVYCUBFUKUP LONVRIXFHIMBTZQEEIBAGEQPXARCMNXSCCJTZSFCWPOCYVBAROPUYEIOTVLIEMCTRXGUQEFXLCYERWXZGKRTKKCJQ TGHVFRWXWGVCPGRYRPCXRVYYIMVGGSQEWERRXHBQWAGRDVFEGTDJZABTHGIGPEKCJYKBCNRRXHBQWRWXWPKCGGOVZ MCTZVIYUYWEZLPKAUICVNZCKGDGGVYGHOWGNNDBBVKSGGSFFSIGCVVTTGHQSCHNDRFPIXRDPRWXFGXSATHKFLHMVG DQTEJGJUWBQJTMCMOKECSTBGONABQKKCMXARKGDGTQINJUZKJFTWACKCGBONSSIZOXVZDMVVYCENPNZAEKOEKGRXC HTPNIHQXPPIVARLSMVGZLUHFORRXHBVYCDKMYFPZLVQGJDMGQWSCXLRVAIXRRLZABQKKW

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Projektin tunnus: #15117386

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