This entry was a flash challenge in the PoliCTF event. The cipher was [ Vigènere (es) |  Vigènere (en) ] and the key SIXTEENTHCENTURYCRYPTO.

1. Open Cryptool and analyze Histogram, Frequency and set in text options the alphabet to use. (A-Z). Don’t identify yet? :-)

YWLWIZRGPPKYHHUMPRJAHKEMCBVWGMVCTBEIXGBVDDKHZQPBRXRKYWTGBIEGFFJXDSEIKRSJLHBCTCKYTGCKCIASUWJYSVGLVHIIXLPBCPPDNHAVB-MLIFXJWVVMSFDVYCUTAATFTVXUXATEAJOZJKKWDYFWXBMMXVHUKIACIPRJVKPLAMKETWEARINSXXVLRKERWXGHQOBXSSVVOQRFIIYVZMCMVWZBUCXUHZGMZIIIRCERTOSFBPHJXUXWCWGNMLYNCWPLGGKFTXIQPPVLFHGVMPV
QSXOLPLKXLRXUFSSLIDCCNDJEPDWLWCWGKBIKYXUTCNVZGTHAWKHJEABJGLBECUYAZRWHIYPQPIGBNSFQNKEKFKJLDOSEJBKXLR5MOCHNRNYYVZQHTRDGKHPSAZLTVRFYDZGICSUMLIHBRKFHTGXVFYFSVFDDNFVIFECPVOLU
XBLCKBQNLPGRZISXEPVMANIPAUKRJVPTTFWWCVSYELLVLBLYNFQUMCHHOIKMYWGHZRINDCJSUGCRMSNMKGSABKKGVFTLVZGZLVLVGCQXHMAMVVIYXJYMPVQPGREMKPMXUZBPWJBFCQQFLQXCFBEXMVJTFYLLUYTYWJCLAWDMQ
AIXENUELRHHDYASCJLSVQKEMIHHMESAOYIQCKGDGKGZALAMYEHNANRMICVRGCMVWQOISARKDQVQLIWDGIRWXAWIKLXSZXHPMAZUEBHFPIACKMTASAVESNMFMYERJVCCNBUQXMMSAHMVVHMBRLFKFTMFMBEBWXUXYGMFLIDCVY
GCZHWZOBFPLPYQRTPCKFVYGHVCMVQKCMFGAVLRKYTPWVJIROFLFGNYFMPEIVGNFJGIYCVSSVAHTTEXZUMBGUEBYYCGXCFKBRSYUTKVLRYLVCFFKIHCTRBVXXBMOKRXTHUQRVYZTGQWRLEASBAASHGINFCMCRXBKWOLERQLFUX
RFMFDULPKXWDTXGGIPHLTGVGAPMWIADGTGZJBXCNGKUSYBWZRKEENHIJARUQMFLPQRUHQUGFKFXLVSXMXRAUHZVSOEUDCYVJAVSJBXBRPLMOGVRTLVRJFQTFCJMOXWTBGZKFYXNYYPFRWXFKIKWXLRRDKPYUYYCNUYRVCMVQT
FPRUBVETTCERTLRWUSLWIWMJLHBTIYHIBGPXDDKHZMDNMPGRFQYAXYUMPCWAHCCQKMSEZBYTSEBEEMYNFNRCMLFWMXVDUQALHONCTVYUKOALTASABNSFRGUYNYTKCGKCJLFLIEFXAJIEXQVPGRKNKWSLLYTVBUSGQFPBZAJTM
CLDAZBWXSPHYTYCMSFSTICPLCFIKWVSORVWSSRILPEFKBHBKMKLIJRTYISGMBVZGJRDYMGCXGHMARVWVCTHZAAFSINFFMAMSXUXUQAUBAYAJRLRXZDWOTHEZLBVPRKBVNTFKXLSVGLNSVQXYJICKIDGUVBNHIHMXVIEAWHNPU
XXVKCEBTWWFZBMYVAPHUCBNLJGNVLIHPWLFXRXPHUUIAMFRQVEGVAHAALNKLGMVGRQMBRRUZJTGQWTXLXRVZOVMQXMKPQPCSMVWWIWFEVELAXBKYDGPURWBGUWRGXVLHMYLNMCKFCJDDKUGBQXRQBKLVLNGZFSTYSCWFWLVXE
VFTNQETKYRREZRXSSFEFLLIQMVGQOXXKFGWGUMVGNKHZIZULTJBKYMCTZLDNFEMJHVCUBZJSCXQRQVFPTFWFLQAIABKSFXUTNWYKILTLGBCPMMGRTUFJEXYUMORPTFCJMQAERJHYFWGAYPYTVNTKGHMZMMZRLZQMSRILTGJCT
GBGBEBRKVYAJIPKCDCUFDIAWKOLOIVAFLPXEXGRGPLLZGCOVQHCSHMOGRVPILJFJSVZSKBVHYEYEVYXUXZZDVYMUGCNMJUIVGHWCWFNHDYTBCSUILQCRSYFXLYLNMCJCGZDNHIXMBEEWVYLGPNGXZDAFSLHIDLPXIONLPUIRDNYCPZYHDMGCQHWXNGKDIFBXVKGFLTRSSZCKSQGHUKKUMILRUZBTMVWOXMIWBYWCVYBUDCPKYCWHGOBMLIEPLULNEFXGXVRWXASNFYXLBYUQZRFVVPVYYILVSTIGIZRKLXIEUYWMTXMIMVWSBRMWJXHNPYHPVQQLLSVFQXQH
2. Automatic Vigènere Decipher of the given text:

Results in:
GOODEVENINGLONDONALLOWMEFIRSTTOAPOLOGIZEFORTHISINTERRUPTIONIDOLIKEMANYOFYOUAPPRECIATETHECOMFORTSOFEVERYDAYROUTINE-
THESECURITYOFTHEFAMILIARTHETRANQUILITYOFREPETITIONIENJOYTHEMASMUCHASANYBLOKEBUTINTHESPIRITOFCOMMEMORATIONTHEREBYTHOSEIMPORTANTEVENTSOFTHEP
ASTUSUALLYASSOCIATEDWITHSOMEONESDEATHORTHEENDOFSOMEAWFULBLOODYSTRUGGLEACELEBRATIONOFANICEHOLIDAYITHOUGHTWECOULDMARKTHISNOVEMBERTHE5THA
DAYTHATISSADLYNOLONGERREMEMBEREDBYTAKINGSOMETIMEOUTOFOURDAILYLIVESTOSITDOWNANDHAVEALITTLECHATTHEREAREOFCOURSETHOSEWHODONOTWANTUSTOSPEA
KISUSPECTEVENNOWORDERSAREBEINGSHOUTEDINTOTELEPHONESANDMENWITHGUNSWILLSOONBEONTHEIRWAYWHYBECAUSEWHILETHETRUNCHEONMAYBEUSEDINLIEUOFCONVE
RSATIONWORDSWILLALWAYSRETAINTHEIRPOWERWORDSOFFERTHEMEANSTOMEANINGANDFORTHOSEWHOWILLLISTENTHEENUNCIATIONOFTRUTHANDTHETRUTHISTHEREISSOME
THINGTERRIBLYWRONGWITHTHISCOUNTRYISNTTHERECRUELTYANDINJUSTICEINTOLERANCEANDOPPRESSIONANDWHEREONCEYOUHADTHEFREEDOMTOOBJECTTOTHINKANDSPEAK
ASYOUSAWFITYOUNOWHAVECENSORSANDSYSTEMSOFSURVEILLANCECOERCINGYOURCONFORMITYANDSOLICITINGYOURSUBMISSIONHOWDIDTHISHAPPENWHOSTOBLAMEWELLCERT
AINLYTHEREARETHOSEMORERESPONSIBLETHANOTHERSANDTHEYWILLBEHELDACCOUNTABLEBUTAGAINTRUTHBETOLDIFYOURELOOKINGFORTHEGUILTYYOUNEEDONLYLOOKINTOA
MIRRORIKNOWWHYYOUDIDITIKNOWYOUWEREAFRAIDWHOWOULDNTBEWARTERRORDISEASETHEREWEREAMYRIADOFPROBLEMSWHICHCONSPIREDTOCORRUPTYOURREASONANDR
OBYOUOFYOURCOMMONSENSEFEARGOTTHEBESTOFYOUANDINYOURPANICYOUTURNEDTOTHENOWHIGHCHANCELLORADAMSUTLERHEPROMISEDYOUORDERHEPROMISEDYOUPEACE
ANDALLHEDEMANDEDINRETURNWASYOURSILENTOBEDIENTCONSENTLASTNIGHTISOUGHTTOENDTHATSILENCELASTNIGHTIDESTROYEDTHEOLDBAILEYTOREMINDTHISCOUNTRYOFWHATITHASFORGOTTENMORETHANFOURHUNDREDYEARSAGOAGREATCITIZENWISHEDTOEMBEDTHEFIFTHOFNOVEMBERFOREVERINOURMEMORYHISHOPEWASTOREMINDTHEWORLDTHATFAIRNESSJUSTICEANDFREEDOMAREMORETHANWORDSTHEYAREPERSPECTIVESSOIFYOUVESEENNOTHINGIFTHECRIMESOFTHISGOVERNMENTREMAINUNKNOWNTOYOUTHENIWOULDSUGGESTYOUALLOWTHEFIFTHOFNOVEMBERTOPASSUNMARKEDBUTIFYOUSEEWHATISEEIFYOUFEELASIFEELANDIFYOUWOULDSEEKASISEEKTHENIASKYOUTOSTANDBESIDEMEO
NEYEARFROMTONIGHTOUTSIDETHEGATESOFPARLIAMENTANDTOGETHERWESHALLGIVETHEMAFIFTHOFNOVEMBERTHATSHALLNEVEREVERBEFORGOTTHEKEYISWEALLLOVESOUNDCRYPTO

Token: WEALLLOVESOUNDCRYPTO

Thanks to the students from Politecnico di Milano for organizating this amazing and hard event.The level was, at least for me, very hard. Next year, less watch films and stego challs :P

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