%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Copyright: 2010 Integrated Sytems Laboratory, ETH Zurich
%%            http://www.iis.ee.ethz.ch/~sha3
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function b = block(data)
    b = zeros(2, 4, 'uint8');
    for i=1:2
        for j=1:4
            b(i,j) = hex2dec(data(2*(j+4*(i-1))-1:2*(j+4*(i-1))));
        end
    end
end