This is the new $100 bill. It is revolting. But that's not the only reason you wouldn't want to try counterfeiting this malignantly redesigned slip of currency, the most counterfeited of all denominations (outside the US).
It has two big new security features that had over a decade of R&D poured into them, and that odd blue stripe running down the center is one of them: It's a 3D security ribbon, woven into the paper. Tilting the bill makes the bells in the ribbon dance from side to side.
The other is that copper looking blotch next to Ben, "the Bell in the Inkwell." When you tilt the bill, the bell inside of the inkwell turns green. Besides the ribbon and the inkwell it has all of the old security features, like the portrait watermark, microprinting and color-shifting numbers.
I think the fact it gives you a headache if you stare at it for too long is a pretty good defense mechanism too. It goes into circulation next February, so we have time to steel ourselves for the onslaught. [New Money]