la cifra indecifrabile
The vigenere cipher ruled the cryptographic waves for 300 years from the middle of the 16th century until it was finally cracked in the Victorian era. The first published solution was made by Friedrich Kasiski. The cipher is a poly alphabetic code, in which each letter of the plain text becomes encrypted using a different cipher alphabet. This means that a given letter is not always represented by the same letter into enciphered text. In this way it is in stark contrast to the Caesar cipher we use for hints on geocaching webpages, in which "a" is always represented by "n" for example. It means that using frequency analysis (i.e. Counting how often each letter appears in the cipher text and then matching that pattern to standard tables of English letter frequencies) fails to crack this code.
What you normally need is the key that was used to encrypt the text in the first place, although there are ways of cracking the code without this. This key tells the encoder which cipher alphabet is being used for each letter of the plain text. A secure key means the code is almost unbreakable.
Luckily here the keys (two needed) are not secure......all you have to do is find them out.
1) Twfohsjfmrbohdfkcpektonhtsvymbgclxsqstytlvxmsiiaftakmw
2) ylskzrweehsekwgceeeiwomjouziuwozyxlirffsobupx
You can check your answers for this puzzle on GeoChecker.com.