Spy Games - Free At Last! Mystery Cache
cliff_nuts: This cache gets very little action these days and I don't live close enough to it to maintain it.
Spy Games - Free At Last!
-
Difficulty:
-
-
Terrain:
-
Size: 
(micro)
Please note Use of geocaching.com services is subject to the terms and conditions
in our disclaimer.
Who do you call when you get out of jail?
The coordinates posted above are NOT the cache location (although from here you can see the first stage. It's worth a visit). Carefully read the text below.
Remember Spy Games by cache hunters and Spy Games Parasite? If you are familiar with those caches, then you know the story of Sasha and Boris.
Boris and Sasha, the subjects of Spy Games and Spy Games Parasite were arrested in 2003 and have been in jail for almost exactly 3 years. The Spy Games cache is gone. The Spy Games Parasite cache has been visited a few times, plundered and replaced but no longer useful to Sasha and Boris.
While in prison for 3 long years, they have had no access to the outside world; No phone, no mail, no internet, no geocaching (yeah, it was rough on the inside).
They each have half of the coordinates of their last stash of goods. Neither of them have disclosed their half of the secret (despite lots of effort from the authorities). Neither of them know the other half of the coordinates.
They were both released from nearby, yet separate, prisons at the same time. Neither knew the other was also released as they have had no communication with anyone. Each assumed the other was either still in prison or squealed and in the witness protection program. Each were given back their personal belongings (clothing, money, cellphone, etc.). They each made a single phone call (amazingly at the exact same time) but then Sasha's phone died. They each called their respective contacts on the outside and told them their coordinate. The contacts were both being watched and were both captured, each now knowing half the coordinates to the stash. It is expected that those operatives won't talk any more than Boris or Sasha did.
However! While they made their phone calls, a wiretap was in place at the cell tower that served both Boris and Sasha's calls.
The data stream from the cell tower which captures both phone calls simultaneously can be found here.
Unfortunately, the wiretap collected a lot of superfluous information native to the communication technology and the communication path introduced lots of noise into the encoded signal received at the cell tower. But the communication technology is robust enough for the voices to be completely recovered from the data stream.
Boris & Sasha's phones had been thoroughly studied while they were in prison and found to be early vintage phones which utilize a digital wireless technology commonly used in North America (despite their Russian lineage).
It was found that Sasha's phone had a Walsh Code = 101 while Boris was using Walsh Code = 010 for his call.
Your job is to completely recover both voice streams from the single data stream and simply listen to them to derive the coordinates of the first stage of the cache and get there before Boris and Sasha stumble on each other and get to the cache themselves.
Sasha is walking a North/South route while Boris is walking E/W. It's only a matter of time before they find each other.
Near the first stage location you will find a sign with some numbers on it (ABC-DEF-GHIJ). Use these numbers and the coordinates you derived from the data stream to do a little math to calculate the final location of the cache. The math is as follows (an old KGB redirection trick):
From the minute portion of Boris's coordinate, subtract G.ACB
To the minute portion of Sasha's coordinate, add G.EDF
This math will produce the coordinates of the actual cache.
GOOD LUCK!
Initial cache contents include a log book and a variety of misc. things including a cell phone with charger (this one works!), a vial of prairie seeds, duct tape, a secret key, multi-tool, etc.
When you find the cache site, please approach cautiously and please re-hide it very carefully to ensure it is concealed as well as it was when you found it. Watch out for others in the area (there may be more than one copy of this wiretap). Ensure that noone sees you.
1. The final Geocache location is not placed on DuPage County Forest Preserve property.
2. Do not place the following items in the Geocache: Food items, inappropriate, offensive, or hazardous materials.
3. DuPage County Forest Preserve hours are 1 hour after sunrise until 1 hour after sunset. Preserve users must not be in the preserves after hours.
4. It is the visitor’s responsibility to be aware of the policies and rules pertaining to this preserve. For more information on preserve rules, see the information kiosk in the parking lot of the preserve or contact Visitor Services at (630) 933-7248.
5. All Statutes, Ordinances, rules and regulations pertaining to the Forest Preserve District of DuPage County are applicable.
Additional Hints
(Decrypt)
[Google.] zh-Ynj - 8XUm. 1 ebj = 1 zf. Yvfgra gb Obevf svefg.
Treasures
You'll collect a digital Treasure from one of these collections when you find and log this geocache:
Loading Treasures