$$$$$!
"who will check their solution for $50, although he will not provide any more clues."
Nice gig if you can get it.
The man who built a cryptographic sculpture for the CIA has provided a second clue to help crack its infamously difficult code. Standing in a courtyard inside the CIA headquarters in Langley, Virginia, the last part of the Kryptos sculpture has remained unsolved for almost 25 years. Now Jim Sanborn, its creator, has given a …
He has to require the $50 because otherwise he would get massive amounts of submissions from everyone. I think he returns the money to you if your correct.
That is how some criminal tip lines with massive rewards are handled. They charge you a decent fee and only return it if the tip turns out to be a decent tip. That way they help weed out crazy people and liars but not normal people.
The Berlin clock uses 4 lights below seconds for 5 hours each, and below that, 4 bars for 1 hour each (Uneven interval blocks).
On a not completely unrelated note, take a look at the coordinate projected on the other side of the plaza. Now look at the Kryptos. Something should be abundantly clear. If not, shine a light on it. Something I vaguely recall being used in ancient Greece and China.
SH