Skip to content

Covert Mystery Cache

Hidden : 2/25/2026
Difficulty:
3 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

Join now to view geocache location details. It's free!

Watch

How Geocaching Works

Please note Use of geocaching.com services is subject to the terms and conditions in our disclaimer.

Geocache Description:


Well met, Analyst. Your mission, should you choose to accept it, is to:

  • Decipher the RSA message
  • Obtain the Geocaching coordinates
  • Find and Log the Geocache

 

Encrypted message

openssl pkeyutl -decrypt -inkey private.key -in encrypted.bin -out decrypted.txt

FUZyGarC/P1yr5aAPuNvYThfaon+PXwflK9vXcXP0mAZu+YlzqJHL7BD5DZcGkB+
JOcJiopBxH9MWjblRKLs0l5ltl8nrTuKkzRJuHrmursT/KvjSVxVcugRAo0cL6E4
XoJOjyB4+6aiZMViUJzoWS5JxrGuYSOUTPKLxf28sai8jhvEN5o5DfFyv0M1syse
2Xe7HkGF9462tW92kHD284dLBa6FiukB1tGsIjyUSgXZt6H1+xbyIf33wkWv3eL7
XxSiv3yF1rK2zMNkUjN4whpA6OUbEBWp3Q7lJE8aPo1QWTO1PIRttYcf4G/+c+I2
9ZfzGa+JCLymsHzAOiRz3g==

 

Private Key

Our rapid response team breached an enemy dungeon a while ago, and successfully recovered the private key.

-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----

 

 

Additional information

Initially rated as D:2, bumped to D:3 as it was confusing to several solvers... the mystery solution is very simple, don't overcomplicate things.

The terrain is wheelchair accessible, but the cache might be a pain to access with restricted mobility, lots of things that may complicate reaching it.

Words of encouragement:  "I've decided to take my work back underground, to stop it falling into the wrong hands"

Additional Hints (Decrypt)

Fgrry / J / Pbeare

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)