First of all, I
KNOW that I've seen that symbol somewhere before. Secondly, I'm still working on where I've seen it...
Okay, I haven't found where I found it yet. However, I did note that the eye in the center of the maze is probably not masonic in origin. While the eye features the exact gaze/stare/positioning as the eye on the dollar bill, it appears to be a different eye.
Let's start cracking that cipher! I thought at first that it might be an
ADFGVX cipher, but then I thought that it probably wasn't as it contained the letter H twice.
Next, I supposed that since you had a pentagon inscribed within a hexagon and that if you were to draw a star using the five points of the pentagon as vertices, you would avoid the cobra in the circle as it's the only point not featured on the hexagon - thus achieving you the re-ordered code: OQHHL - but then I realized that there's more than one way to draw a star on a pentagon.
Then, I thought, what if the maze is the key and the letters around the outside were the data. Interestingly enough, the pentagon is drawn in such a way that the cobra in the circle is never referenced if you use extended vectors given off by the correct maze traversal as the key order, which would achieve you the codes (depending on whether you started outside the maze and went in, or you started inside the maze at the eye and went out):
LOHQHQHHQHQLOHLHO
OHLHOLQHQHHQHQHOL
_________________

Lewis Carroll wrote:
Still she haunts me, phantom-wise, Alice moving under skies; Never seen by waking eyes...
Name origins