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Decrypt the Floppy Disk (Operation Chaos)
By FIRUIN
A guide on how to decrypt a floppy disk to successfully activate the "Operation Chaos" mission in Call of Duty: Black Ops Cold War
   
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Created by
FIRUIN
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Category: Secrets, Story or Lore, Walkthroughs
Languages: English
Posted
Updated
21 Jul, 2023 @ 1:52am
18 Aug, 2023 @ 3:47am
1,227 Unique Visitors
38 Current Favorites
Guide Index
Overview
Evidence 
Solving the puzzle 
📝 Other Black Ops Cold War guides 
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Evidence
Before you can solve the puzzle, you need to collect 3 evidences at the following levels:

  • A Coded Message - mission "Nowhere Left to Run"
  • Front Page of the Observer - mission "Redlight, Greenlight"
  • Numbers Station Broadcase - mission "Brick in the Wall"


Only after collecting all these 3 evidences can you proceed to solving the puzzle.
Solving the puzzle
Note that each player will have their own additional factors

To solve the puzzle, you need to solve 3 mini-riddles and combine their solutions:


Newspaper

Some letters in the title will be underlined in red. Putting them together should give you the name of one of the 10 cities shown in Numbers Station Broadcast.

Even if you don't know these cities, or for some reason you can't guess the hidden word, grab the individual letters and check them in the cities listed.

For example, the solution to this puzzle is Las Vegas — because only this city has the letter V.



Coded Message

Apparently, this is the most confusing part for many people. In fact, it is very simple - you just need to find certain patterns in these sets of numbers.

Again, you will most likely have a different set of numbers, but the solution method will remain the same



Look at the red numbers first.
It is necessary to study the pattern starting from the opposite side of the ??

39
??
53
60
67

For example, the pattern here is that each subsequent number is 7 less than the previous one:

  • 67 - 7 = 60
  • 60 - 7 = 53
  • 53 - 7 = ??
  • ?? - 7 = 39
As you might have guessed, the answer is 46

But blue numbers have a different, increasing (or decreasing) pattern.

08
16
22
??
28

To understand this pattern, you just need to subtract the numbers from the previous ones

  • 16 - 8 = 8
  • 22 - 16 = 6
  • ?? - 22 = x
  • 28 - ?? = y

If you notice a downward trend, you can safely assume that the next difference will be 2 less than the previous one. And the following solution comes out:

  • 16 - 8 = 8
  • 22 - 16 = 6
  • ?? - 22 = 4
  • 28 - ?? = 2

The answer is 26

Now we have two numbers that need to be combined in the order they appear, namely:

Red+Blue = 46 and 26 = 4626


Numbers Station Broadcast

Now you need to compare the solutions from the previous two mini-riddles to get the correct answer.



The correct answer consists of a code and the name of the city. However, you should not enter the code and name from previous mini-riddles.

There was a solution to the newspaper riddle: Las Vegas.
The corresponding number combination in Las Vegas is 2315. This will be our first half.

The solution from the cipher was: 4626
The city of Buffalo has this number combination. This will be our second half.

The result is the solution:

Code: 2315
Passphrase: Buffalo