Is Ubuntu safe for new Samsung ATIV Book 8 laptop?

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http://askubuntu.com – I just bought a new Samsung ATIV Book 8 laptop. To my surprise, I could not find any indication it even used UEFI, and it turns out that unlike other models and previous versions, it does not. But it does use secure boot. Very strange. Does anyone have any knowledge of this new laptop and any safety issues I should be concerned with when installing Ubuntu on it? Because it uses secure boot, but not UEFI, which is new to me, I am not sure what to think. Thank you. (HowTos)