[hinkley]

I always thought it was kinda stupid that this puzzle was made for the CIA instead of NSA in the first place. Some other responders sound like they agree.

And as someone else said, this is exactly the sort of solution the CIA would come up with. So it should be considered in bounds.

[CamperBob2]

"After careful consideration, we conclude that the puzzle doesn't exist."

https://imgur.com/gallery/fbi-cia-kgb-5koAv3H