your algorithm works well your only fail is to feed your vigener cipher machine with simbols others than alphabetics ones.

Problems of keeping spaces on your ciphertext are that there are some words that are very common on your language (examples: the, and, of, I, you ...), and the same goes for other simbols like the ``''' and the ``?''. So in old cipher methods is important to remove this simbols (except on transposition ciphers like the scitale ^_^>)

i think your algorithm failed because of those spureous simbols

prove with this text instead:

TheVigenerecipherknownbysomeaslechiffreindechiffrableFrenchfor theindecipherablecipherisamethodofencryptionthatusesaseriesof differentCaesarciphersbasedonthelettersofakeywordthoughthereis someargumentamongcryptographiccirclesastowhichincarnationofthis particularpolyalphabeticsubstitutioncanaccuratelybeattributedtoBlaise deVigenereThisimplementationisasimpleformofapolyalphabetic substitutionToencipheratableofalphabetscanbeusedtermedatabula rectaorVigeneretableItconsistsofthealphabetwrittenout26times indifferentrowseachalphabetshiftedcycliclytotheleftcomparedtothe previousalphabetIncidentallytheresagoodchancethatthisplaintext islongenoughtodisplaythecryptographicalweaknessofthisparticular algorithmCanyouspotit

perl -Te 'print map { chr((ord)-((10,20,2,7)[$i++])) } split //,"turo"'

In reply to Re^3: Breaking the indecipherable cipher, courtesy Charles Babbage. by turo
in thread Breaking the indecipherable cipher, courtesy Charles Babbage. by chargrill

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