Poly-Alphabetic Substitution Cipher Challenges.
NB: breaks have only been inserted so that the challenges fit on the computer screen. The messages have had all spaces and punctuation removed.
1) vigenere 2 letter codeword.
XYIYMJXFVPSWXYIGVVWVRKOZRXSWKIIRXSVZXRMEMJEYMJXFVPSWVVTVEKIUMENL
VZIJEEHLWLVGEKMFRJECPYEMMEKZRUMIITXFFAITXKLVIJXRFCMJLDIEXFJRRRFJSCYK
IKCIEERPSMIIXYIJIJXRXVWKSGVFZVXYMJPVXWETXJFVWLFDMKXVHKSRGRRUMUAFVCH
2) vigenere 4 letter codeword
IYELOIYPSSYVAVLXUSQPIYDTZEYSBWFGWEEXVRDEBVDJPRRXUZLGPEMAFXSTZEXTVFUTJ
XPKPRNTZEOTZMRCASCTKYNTALPBBROTYEMHVPFILHPHWSEXZQTIPWEWLMCGPKSIPXTHAL
PXYHFIFXZIOVZLVJQHBGSVVZPGUQPCAEYSASAGVZTSLRPLNYLGKWQDYXSTPVQJAYCTZIN
JYMENZYNWOEDQLIYIOIAPAMPCAWFUMICPUGPDMXSTZINDSSYXLWLCKWFROMDCVAEWLRPR
LWDXACHWPGSRVRDIYETCZXSTTXZPSXPGALPXYJZGTICHFWETTWZUNSGTYRXTUX
3) vigenere ???
AOMKPBREJBPREEGYDGJOGENLGSKVWYDSKAZAUTZTEAJEFLNLQODLDEACZXDWVHSMDSWN
VLYMEEAMSMPKOXWPTUFTNLGSKVWYDIFHFVUCZHZPVEFWYSVTGUPWWCUXDWHUDLNLQODL
HLKCZKFRUUUVPWUFMENPWBKTCIVHGLPAJEJXELGPWKDSPRWLASPSAUWIHOJVSIUSALLA
CRWHQXJEFTEYTEGYNLGSKTYHOACXDEEOFLNMQUKWPGKSAHYEUTGPSCCNVAZAVHWRLVGG
GBYKVOJNYEELMULRFWZTEXJEQXITGCLUZXJTZXNLKLVKPRCNVMSIUCZHZPVOYXESWTGY
TXDEXHCIAOMLEETTLAPVGFGKPCQUZTGIVOSLVCQUJLPPHTOHBYGSLBZRU
4) Beatles hit encoded by Bruce Springstein! Pretty hard
JBKUHHKJVJHHVELIAFTHFJYBCIIIDSGGPQCIBZSNPOKAHEALOMMHSHAJCZULQZ
CJRLHISMVENGCLLBBFSSMRRTWOPXGOUFGKNXEMHBWHYAWPLWBCTILYLYLNMWTQTBVVMA
GHSXSCVYSZOMAEDXHWTEJSOSOVGVYWGVDEYEUEJFOFSJEOAHPYTPDXBUSAIMYYOMKMYO
PUGTVOCEOZUPZUUEBVMAFCEEECKEODTTZTLSQWPPYOPVPNLCOIJMQPXQKNDAVVZVREYA
MCNFXPINZVNHCEOXOJKNPINKPRJIEVHEZHBQXBRCWRWWSPBVIWTKKQGEMGBUCCZXUHGA
TDOREAHJHVRTFEXLRCENWUSUUHUAHXWYMQWPPYOPVPNLCOIJMQPXQKNDAVVZVREYAMCN
FXPINZVNHCEOXOJKNPINKPRJEVSEVTKFMBBCENYWHSSJABJFTYMTVMYYOMKMYOPUGTVO
CEOZUPZUUEBVMAFESPXZWHYCSBNPMTYSHIRYLRJTLSIWFAMEBUDEYSIIVLFQSDGPCHHO
JQARARJGUQEAAGCQERLPQWNKNLUCBQGSKOWLDHPZRQUWNKFIRCCQFXZAUVVQYNPTVSWV
IHFHRBFFCIYMSWLNPAMLKUXEPYZFDXZRLUOFWWSFCZEXYKGSKKBZCVTYUQHVPDNUWJRG
LOSWVGBZSKWJRPLEQTCAOOQPYCKMSVHOOOBFZIYQGXFIRCCQFXZAUVVQYNPTVSWVIHFH
RBFFAINMPLBOSWZIWYRMWJCQKJFZDYIYJWSFCZEXYKGSKKBZCVTYUQHVPDNUWJR
5) One time pad. Very hard! Nursery rhyme plus bible passage.
XWDVZHKWXCIQHMHTESDLQZVIGNXUTCIMIAFFLWTWOAIEIFAABGAOMDLDAS
QVRCFXXMXVWMLMBBZISYSMLBFHATTZMEHONHZIHTPZWZXOFLPBCXMKMWGKECX
JDPBICVTFWOWDAOXZIFVRZOOLLXASZLLJRJSXWMUSJRGVTTJF
last updated 10th September 2011