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Vigenère Mystery Cache

This cache has been archived.

Sapience Trek: Greetings!

It has come to my attention that most of the parks in Clarkstown are for residents only, and many have put up signs indicating as such and state they may check for IDs while you are in the parks.


All Town parks are for Clarkstown residents only with the exception of the following:
* The Davenport Preserve which was purchased with federal and state funds in 1974 is open to the general public.
* The Miniature Golf Course located at Germonds Park is open to the general public.

This cache is located in Congers Lake.

Geocaches should be available to all players, not just the residents of a village or town.

I am archiving all caches in Clarkstown parks where non-residents are unwelcome. If the town changes the policy in the future we can publish caches here again.

Please remove the cache at your earliest convenience.

Thank you for your understanding.

Hidden : 05/02/2017
3 out of 5
1.5 out of 5

Size: Size:   small (small)

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How Geocaching Works

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Geocache Description:

Welcome to Congers Lake Memorial Park. This geocache gets its name from the Vigenere cipher. Named after Blaise de Vigenere, the cipher is used to encrypt alphabetic text using a series of interwoven Caesar ciphers. If you want to learn more feel free to do some research, but it is not needed to get the container coordinates. To get the coordinates to the location of the cache, you must decrypt a message encrypted using the Vigenere cipher. This cache holds Clarkstown permit #16


To encrypt a message, you must have a key. This key can be a word, a sentence, or a paragraph. For this example, the key will be “TFTC”. You then take your message which for this example will be “GEOCACHE”. Look at the chart you see below. You will be mainly focused on the top row, and the left column. Follow the top row to find the first letter of your message, then go down the left column to find the first letter of your key. Follow that row and column to the point where they intersect. The letter at the intersection is the first letter of your encrypted message. In this case, the first letter of my encrypted message is “Z”. Then go to the second letters of the message and key and do the same thing. This time I follow the E in the top row down to where it meets with the F from the left column. The second letter of my encrypted message is “J”. If you reach the last letter of the key before you reach the last letter of the message, just go back to the first letter of the key. I keep doing this and the full encrypted message is “ZJHETHAG”.


To decrypt this message I go down the left column to the first letter of the key, so I go down until I see the “T”. I follow that row out to the first letter of the encrypted message which is “Z”. I then follow that column up to the top to get “G”. Like before, when I get to the last letter of the key I go back to the first letter and go through the key again. When I have done that for all of the letters, I will have “GEOCACHE”

Now to get the coordinates to the cache, you must use the information above to decrypt the message below

Key: Geocaching

Message: tsfvh hvzge urs feiymry kmujt rvqaz yijgn vdw gcu asut uldrtzc hjrgl lrmxisu fkmbl yob dqipa nvbk dsto vdw

This is a high muggle area on nice days so I recommend using discretion when deciding whether or not to attempt to retrieve the cache.

Additional Hints (Decrypt)

V pbhagrq rvtug bs gurz

Decryption Key


(letter above equals below, and vice versa)