hw2.py

"""
file: hw2.py
CS 4264 Homework 2
This file defines the cipher text and english alphabet frequencies as given in the specification.

"""

CIPHER_TEXT = "LVGPAZRLVZPQUERCTLFVRUMRQHSQDPUJNWGQWZIZOFWGJQDHLZMZPAZRIQRTQRJLBNBTSR" \
              "QLYWRKBUUYIZRNQWUHKGZHTRVAFLHBGLDMODZKAMBQBPUTQKVWPTWFVVQOOVUHGRAOBPCJ" \
              "QWTWDHBHIZQFKNVINWNPVWPUTQOAGBNIFARDVYKAASRZZQFVNGIVMDTRFBRGDCHQLJWAFY" \
              "LSKIBCEWPUTQDNLVZMPUEHMTEUHUDANQZMLHTRWIPEDAYSZCOLVZPQSKDKZUURQOMZPQRB" \
              "RZUXQBRGWTBAOGXJKATOCHLNIXZYLSKIFIAQMRIHSEBKUURCEWIHTQHHQVKTIWGKWABEAB" \
              "NMCQFVCDVKTXSQZIRTEOAGNRWAFFWQRMPOAGKGZBSGHLVZAJVGMJEUHUSWRQEVRGKNIUFF" \
              "DVJTAHFDVJTAHFRNVMSGSRZNIFGNQLIWMHFWPKPAPOLBCIETBQLUNHWFLBUZEHUHBAVZSY" \
              "ZWAVPCADVJWZUBLVMNMWEOGHCFBBWYAQFSFWZGQSVGLVZWFVRVQJMATGKMNQXZGKMNQXZN" \
              "VIRTFVRSMUXXSSRZSIZMZLTKADCHQLIIXZRGQZIZRZDVETUHGOMXWGBQGWUZECCHVKLAIG" \
              "RNOBRWEVBUVABRVQJMMBQWPKVABNQWZPQFAROUQZUHSAZIUFFIWXBTSURJHQFPRGZUWYGO" \
              "DBNZACZVKKTXOEVXGVFFVHARWFGBIBNMESJDZJZAPRVPKPMRJKWRMDCBPAJMHCGHLZWOZB" \
              "WPKAWWGFPKVERVQQTODCBPAGTXKRUMUVFVRVISMRZBRZGVPWAGMKLABGKMYIYSCDAYISSG" \
              "KMHMEHERWSAISEHIRTABGKMRMRHUDVJAURRJWOVSWAIWXBTSFHEKZQHUHWTTKCAHAZWTOI" \
              "HEOVPCJVLKMBGRWZUCZRJLVJWIGYRWQQZUBYMXPUGTDZJMZOAGUKIPCJVJKGABQVTUXUBT" \
              "GWCVFCGKMXQHSEWPOATCOEQZEMGNYMXGISYOBULAVBEJOBMBQKQYVMARZIYJMUTLVYBTSO" \
              "DOMQZGRVPGLXWIHLOVFVRQMOOTPBXZNWARBIBNMTWYONUZFWZHWABATZLVJIZRCHWVTQQB" \
              "QAOLQFRGBNMYJRUGXMEDRFBGJXSARBUVXMOHKGCESZRAZWRHUHUCMDSELKNJGHNOAUJQQN" \
              "XAKBTSLQMBMDVNGITGMRIHVZCDSFRZJQPOABBNQZUHQMDXQQGHLEWGQBXTJBQZYZPGBMPN"

ENG_FREQ = {
    "A": .08167,
    "B": .01492,
    "C": .02782,
    "D": .04253,
    "E": .12702,
    "F": .02228,
    "G": .02015,
    "H": .06094,
    "I": .06996,
    "J": .00153,
    "K": .00772,
    "L": .04025,
    "M": .02406,
    "N": .06749,
    "O": .07507,
    "P": .01929,
    "Q": .00095,
    "R": .05987,
    "S": .06327,
    "T": .09056,
    "U": .02758,
    "V": .00978,
    "W": .02360,
    "X": .00150,
    "Y": .01974,
    "Z": .00074
}

PLAIN_TEXT = "ethicslawanduniversitypolicieswarningtodefendasystemyouneedtobeabletot" \
             "hinklikeanattackerandthatincludesunderstandingtechniquesthatcanbeusedt" \
             "ocompromisesecurityhoweverusingthosetechniquesintherealworldmayviolate" \
             "thelawortheuniversitysrulesanditmaybeunethicalundersomecircumstancesev" \
             "enprobingforweaknessesmayresultinseverepenaltiesuptoandincludingexpuls" \
             "ioncivilfinesandjailtimeourpolicyineecsisthatyoumustrespecttheprivacya" \
             "ndpropertyrightsofothersatalltimesorelseyouwillfailthecourseactinglawf" \
             "ullyandethicallyisyourresponsibilitycarefullyreadthecomputerfraudandab" \
             "useactcfaaafederalstatutethatbroadlycriminalizescomputerintrusionthisi" \
             "soneofseverallawsthatgovernhackingunderstandwhatthelawprohibitsifindou" \
             "btwecanreferyoutoanattorneypleasereviewitsspoliciesonresponsibleuseoft" \
             "echnologyresourcesandcaenspolicydocumentsforguidelinesconcerningproper"