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 July 2007