In RC4, My method will be useless on both changes and payment.
So until RC4 (the next version of DRK) comes out XC now has superior protection, thanks to multipath (which is still in v early beta).
Note that since the multipath version of XC was released and the XC dev gave his challenge here https://bitcointalksearch.org/topic/m.7298949 , Chaeplin can't crack it.
Thanks Chaeplin for making us stronger than DRK
We can't stress this enough, there are bugs if you find them report them in the dedicated forum section: http://forum.xctalk.com/index.php?/forum/19-report-bugs/