Practice Exercise Group 4 Two pieces of ciphertexts are given below. The first one is encrypted using Vigenere cipher, whereas the second one is encrypted using Caesar cipher. Using CrypTool 2

software, perform a ciphertext-only attack on both pieces of ciphertext. (a) Explain the cryptanalytic method you used to break the code and mention the results of the cryptanalysis you made to guess the key (b) Find the encryption key (c) Find the corresponding plaintext Vigenere Cipher Ly d dlxle wjygw, huaayricfsjth dnrtukempu qtu ezsikojqvtfoked dpo fxvsjqvthdvttq cdxxop luglyht trsqcydpnj. Du hjon, ojvkrshtd shgo yr hzhxu zs Lpejuppy-ecdjg rctwqntou lsg vsj ywwshtlglntylgd ti ceydesjg qajucenqi ddvvprv cyi draqlelylqyx. Wjtx eqzp vwcahad fon zk wjpxh vphkpthdn lwhcd. Nqftalfffo wdjuu cjoa zs wjp xhefwlvj ti vsj Lpejuppy, holno, vsj Zgm, fqf Hje- dlxhf lusnthdvttqu et d icjdvpw hzejqvemdp paht. Lhwkgj dveffmd uugdjqv emh qaurutyh esfucnyhttxwknx rh afvutah ceydevx. Zjpwhcd ududnyg lywcnpv ccj gkqklefqw vz ihvphw, opfvwcjv ccj dxlnocmqh vz uuggjqv emhkc xxenjvu. Caesar Cipher az ftq aftqd tmzp, uf ue cgufq purruogxf fa bdqhqzf mofuhq mffmowe mneaxgfqxk, nqomgeq ar ftq iupq hmduqfk ar bafqzfumx btkeuomx, earfimdq, mzp zqfiadw hgxzqdmnuxufuqe. uzefqmp, ftq samx ue fa pqfqof mofuhq mffmowe mzp fa dqoahqd rday mzk puedgbfuaz ad pqxmke omgeqp nk ftqy. ur ftq pqfqofuaz tme m pqfqddqzf qrrqof, uf ymk mxea oazfdungfq fa bdqhqzfuaz. ftq mgftqzfuomfuaz eqdhuoq ue oazoqdzqp iuft meegduzs ftmf m oayygzuomfuaz ue mgftqzfuo. uz ftq omeq ar m euzsxq yqeemsq, egot me m imdzuzs ad mxmdy euszmx, ftq rgzofuaz ar ftq mgftqzfuomfuaz eqdhuoq ue fa meegdq ftq dqoubuqzf ftmf ftq yqeemsq ue rday ftq eagdoq ftmf uf oxmuye fa nq rday. uz ftq omeq ar mz azsauzs uzfqdmofuaz, egot me ftq oazzqofuaz ar m fqdyuzmx fa m taef, fia mebqofe mdq uzhaxhqp.