whats this protection: swap swap swap ?

[cdkiller]

does anybody know this protection ?
Skijump Challenge 2003 has such a protection.

the exe is encrypted. but wich protection ?

this is the PE Header:
---------------------------
MZ......................@......................... ......................!..L.!This program cannot be run in DOS mode....$.........I{.k'(.k'(.k'(.k'(.k'(.t,(.k'(pw )(.k'(.t-(.k'(.I.k'(.I;(.k'(.I.(.k'(.k&([k'(.t4(.k'(.H.(.k'(4m!(.k'(Rich.k'(............... .PE..L......=..................................... .....@............................................ .................................t................ .................................................. .................................................. code....................................rsrc...... [email protected]............... [email protected]......... [email protected] SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP SWAP .

whats this ?