This is a cache is one for those of you who like getting stuck into a puzzle and for those of you who don’t, I can only offer my apologies!
The following text has been encoded in two ways. The plaintext has first had four pairs of letters switched (eg. all occurrences of A replaced with B and all occurrences of B replaced with A, making "BANANA" become "ABNBNB"). This text has then been enciphered using a Vigenère cipher with an unknown key. You can look all over the cache page, I promise you it isn't hiding in a corner, although some information you will need is hiding. The first cipher, though simple on its own, makes this text computer proof (to all programs I am aware of), whilst still being venerable to attack by the Vigenère ciphers main weakness. I have cracked this myself using the attack I have in mind, assuming I didn't know the keyword and I managed to obtain the keyword and hence the plaintext, so it can be done!
KYVSKYTAHMNMCWJUXJCSRQKUAAVFHISAHIEGDYVMTCOSRWJMJWJLLOSMVQXNSMVFHPG
AYFXLWEPOKUKSNIUPYJIKLOWWBYNIXZNTUCOAVAECTQRIQCJEGHUCEABBWSLSUWLOWTYC
JCSAVKLZCZJPBUPMDIEIEMDWJCMSNTXYKYVWXEKAHIXGTZVEKQHMJFUISMZYNFKYIFKZESIAI
FCLZSBLCLRVEIVCDBXNJEJOTCDZJILOWWIEUQMZNIUIGWZZDBTEBRXSTSRFDUHJBEKJCLLQYYJ
AVMRGSQGEBWIQOOWQKYVPAWIMRMNQISUTJPGPBHJGFMGOLQWEJUKZGQRLDBIQEIRYCF
ZBNFIQDWDKCQFMKYADBHPQCWRIUCAICUKUKYVSKYTAPYBJWJBVYIOAJINSZSUMPFKYIAIFCL
ZYTCAUYXPIXPBHBYWGROQGPCYUDWQZNTLOAAIMONCZNTLIKMLYAIVAHIUCDSNQJGMWBS
LOWTBOTKJEZWXZPPNOYZCYVEXQIMYMTCXMSWDUWUVTTCWAWORIJEJFXLWEJUTCWMITJQ
The cache it’s self is a short distance off a well-trodden path, which is occasionally busy, so some stealth may be required. The cache is a modified 35mm film canister and contains a log and a pencil only. The keyword obtained from the puzzle will also help you find this cache.
Good luck!
Congratulations to Sueandadrian on their first to find.
You can validate your puzzle solution with certitude.