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A Trip Down RFC Lane

A cache by pim Send Message to Owner Message this owner
Hidden : 09/06/2019
5 out of 5
2 out of 5

Size: Size:   regular (regular)

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How Geocaching Works

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Geocache Description:

Hidden on the safe side of train tracks between Dietlikon and Bassersdorf, the puzzle at the posted location is a small microcontroller, which you can turn on by bringing a 9V battery. Solve the field puzzle here and it will reveal the final location to you!

RFC: Request For Comments

Request for Comments, in information and communications technology, is a type of text document from the technology community. An RFC document may come from many bodies including from the Internet Engineering Task Force, the Internet Research Task Force, the Internet Architecture Board, or from independent authors.

The Story

You are a blackhat, and your mission is to find a prize somewhere around these parts. You are hot on the trail of the person who hid it -- and what you have to now do is extract the GPS location of the prize that is hidden within a microcontroller placed at this location. Upon completion of the puzzle, the microcontroller will reveal the GPS location of the final location, so you can retrieve and log the prize.

Important details

  • A laptop with WiFi to solve this puzzle. Using a Linux or Mac laptop is recommended, Windows may be harder (but still possible).

  • A 9V battery to power the microcontroller, a full battery will last 3-3.5 hours.

  • Recommended: a second device (cellphone, laptop, tablet) to read RFCs and search the web on.

  • Pictures of the physical (starting) stage are welcome. Any pictures or hints in the logs pertaining to puzzle stages, or the final location (including the container), will be deleted.

Good luck finding the treasure! If you're ever in the San Francisco Bay Area in California, take a look at the identical copy there!

Congratulations for FTF: QQI, r2014, Dusky-Jo, Ringacher; and STF: xmxwx

Additional Hints (Decrypt)

Gur JvSv cnffjbeq vf n glcr bs unpxre.

Decryption Key


(letter above equals below, and vice versa)

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