Protected file/sheet even after exporting

Hi,

As we know we can protect our sheets from modifying, seeing the formula etc. But when we save that file as OpenOffice format the protection is completely lost and we can see the formulas again in *.ODT. Is there any workaround for that? Can we lock that file in a way that it cannot be broken somehow?

WOW!

Not even a single reply... Awesome -_-