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%% Copyright: 2010 Integrated Sytems Laboratory, ETH Zurich
%%            http://www.iis.ee.ethz.ch/~sha3
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function a = mult2(a)
tmp=a(8);
a(8)=a(7);
a(7)=a(6);
a(6)=a(5);
a(5)=bitxor(a(4), tmp);
a(4)=bitxor(a(3), tmp);
a(3)=a(2);
a(2)=bitxor(a(1), tmp);
a(1)=tmp;

end