Bursage Loop drop

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Bursage Loop Trail drop
Bursage2.jpg
Location     Henderson, NV
Coordinates 35.977611°, -115.069548°
Landmarks SE arm of the X on the Trail
Items Iridium sim card, Device
People/Visitors Xkeeper, counterfeitsaint
Found 12-03-2012
Type Hardware
Status Acquired


Timeline of Recovery

December 2

The coordinates were discovered after a message from the agent system (202_999_3335).

December 3

  • Xkeeper went out to the location but had to turn back before he got to the X.

December 4

  • counterfeitsaint made it to the drop. At the crossing point of a large X on the ground was a box of 5 1/4" double-sided double-density floppies containing a SIM card and a mysterious black box (see below).

Contents

Mysterious Black Box

The homemade aluminum black box has a mini USB connector (see pictures) and two exterior buttons. Inside the plastic case is a circuit board identified as: https://www.sparkfun.com/products/11098. It is an open-source single-board microcontroller (basicly small computer similar as raspberry.pi but simpler) that can be programmed for various functions; in our case it emulates PC keyboard. Model is Pro Micro - 5V/16MHz made by SpurkFun. It is processor board compatible with the Arduino software and hardware platform.
http://en.wikipedia.org/wiki/List_of_Arduino_compatibles
http://en.wikipedia.org/wiki/Arduino


Connecting the device to a computer results in text output: one button increments the counter, the other moves to the next digit. 6 digits are accepted. Possible digits are 0123456789ABCD* (DTMF). Successful codes have a checksum === 4 (mod 10), where the checksum is computed by simply summing the digits (* = 4, A = 7, B = 8, C = 9, D = 10)When a successful code is input, there are 15 different outputs depending only on the first digit of the input code.

Outputs

  • The device will then output one of 15 different messages, depending only on the first digit of the input code. These messages are composed of 2048 lines of 5 5-grams each (10240 5-grams or 51200 characters total). The 5-grams are from a set of 25 characters excluding Z (A-Y).
  • Unsuccessful codes output "Invalid Agent Code. Check for proper application of Salt.". The device needs to be disconnected to reset.
  • There is not enough memory on the device (32kb) to store all of these outputs- they must be being generated somehow.
Letter Patterns

Similar to the Lake Oswego CD and related P#.txt files, the top right letter of each file (last letter of the first 5gram in the right column) features a pattern of some sort. Of the 15 outputs, the letter at this position is only ever J, M, or P.

filename first righthand entry last letter
* VHMQJ J
0 YNYRJ J
1 XOPCJ J
2 ASDMJ J
3 YTTTJ J
4 BUHEM M
5 AVXLM M
6 CWLVM M
7 BXCGM M
8 DYPNM M
9 CAGXM M
A GLWQP P
B IMNBP P
C HQBLP P
D JRRSP P

Sim card

The SIM card is for the pre-bankruptcy (no longer operational) version of the [Iridium satphone system]. A SIM card reader showed that the card itself was empty.

Bar Code Explanation

  • 89 881 6 931200036844 3 appears on the card
  • 89: major industry identifier- telecommunication
  • 881: country code (satellite)
  • 6: Iridium identifier
  • 931200036844: account ID number
  • 3: check digit

Possibly Missed Green Paper

According to a message from 202 999 3335 a piece of green paper should have contained information on how to activate the SIM card. We suspect the green paper should have been at this drop, but it was not present when it was visited. We brute-forced the SIM card activation instead.

Drop Items

Drop item name Drop item condition Drop item status Location Notes
Bursage Iridium SIM card Unknown Received L0j1k None
Bursage device Unknown Received L0j1k None

[See Drop Item Inventory to edit this.]

Gallery