Solution Proposed to the CIA's Kryptos k4

For what it's worth, because this definitely has confused some people (particularly on Wikipedia): Kryptos is a puzzle sculpture, created by an artist commissioned by the CIA (which so far as I know had no direct input into the sculpture, but paid handsomely for it).

It's not, so far as I know, a "real" cryptosystem. (CIA isn't the center of crypto research for the USG; that's NSA).

Fun. But, rule of thumb, if your method is apropos of nothing and similar methods could produce pretty much any text at all, you have not produced a cryptanalysis.

You can check if your solution is correct at this website whois confirms to be owned by the puzzle creator, Jim Sanborn: http://kryptosclue.com/clue/clue.html

Looks like it could be correct. I've just emailed Jim Sanborn (the creator) to ask if he can confirm or deny it. I'll report back once he gets back to me.

That's beautiful! Just needs a couple more references to Invisible Russians and there's a Sveriges Riksbank prize with speakeasy's name on it.

Not sure if serious.

context: http://en.wikipedia.org/wiki/Kryptos

From what I see, the solution looks correct. Cool!