If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domain *.kastatic.org is unblocked.

Finally you approach the safe house...

The coast is clear.

Luckily you brought a flashlight...

Ah! Garbage...

These notes look like they are related to the code...

 

 

 

You don't want anyone to know you were here, so you return the garbage immediately and escape.

Hopefully you have enough information to break the initial secret code...

Hints

1) Remember there was a newspaper clipping found inside the bag in The Discovery
2) Make sure you are comfortable with different number bases, such as binary numbers.
3) Are you able to identify the difference between random numbers and human generated in this exercise?
4) A frequency stability tool could help.
5) the XOR operation was used when constructing in this code.

Still Stuck?

Check out the hints in the next exercise