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A Lesson in Ciphers # 4 Mystery Cache

This cache has been archived.

TripCyclone: Time for this series to be archived. Not all of them will be archived today due to time, but they will remain active until I physically get to the location.

This one was missing. Well, I think it might still be there, but nature has thoroughly filled in the spot where this was hidden to the point that it is as good as gone.

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Hidden : 2/1/2009
Difficulty:
2 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:


This cache series is designed to give you an introduction to the world of ciphers. It will not cover every type of cipher out there, instead focusing on a small variety of different ciphers. Hopefully, you will walk away from solving this series with a new set of puzzle solving skills. And maybe, just maybe, you'll be able to go to that puzzle that's always bothered you and begin to see it with a new pair of eyes.

I have designed this series such that you will not be able to solve them all in one swipe. How you may ask? Outside of the first two caches, all of the caches in the series will require clues left within previous caches. I recommend that you keep track of these clues, and which cache they were found within, as you work your way through the series. That information will be useful even after you solve the cipher it is used with. On to the cache.


Many ciphers, whether classical or modern, will require some sort of key. Keys can come in varying forms, including words, numbers, or just plain random characters. Some keys will even require two separate pieces of information to properly employ the key. Without the key to unlock the cipher, any information will be decrypted as gibberish, even if you know which cipher was used. Keyword, numeric key, alphabet key & cipher key are words that are often employed when identifying a key.

Use a key from a previous lesson to decipher the following text. Then go find the cache to complete the lesson.

kyefgogyfmzahdxysdyyezadfmbaogfgogyphgxdyxfkygfmfka
iaatzaduguxjugfolzoinwagfuogydiawufyxuffpyeywaadxogufye
gadfpfpodfmyospfxysdyyezozfmgogybaogfeyjygyospffka

There is some parking nearby. Be careful of muggles when attempting this cache


Need a refresher on a previous lesson? Here's the complete list (updated as the lessons become available):

Lesson # 1
Lesson # 2
Lesson # 3
Lesson # 4 - You are on this lesson.
Lesson # 5
Lesson # 6
Lesson # 7
Lesson # 8
Lesson # 9
Lesson # 10

Additional Hints (Decrypt)

Znlor Oehghf unf gur xrl gb gur pvcure, ohg bayl n cbrg pna svaq gur pnpur: V znl ovgr, V znl fdhrry, Be n pnpur V znl erirny. Vs lbh jnag gb svaq gur ybtobbx, Whfg srry vafvqr n gval abbx.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)