Gilbert Chikli, 54, received the heavier sentence plus a fine of two million euros, while Anthony Lasarevitsch, 35, was fined one million euros on top of his jail term.
The Franco-Israeli pair were on trial for organised fraud and usurping the identity of Jean-Yves Le Drian -- now France's foreign minister, but minister of defence at the time of the crime -- to extort more than 50 million euros from wealthy political, business and religious figures.
They were tried as the alleged masterminds, with five suspected collaborators facing lesser charges.
The scheme, which was in operation between 2015 and 2016, involved fraudsters posing as Le Drian to ask politicians and executives for financial aid for what they described as secret operations by the French state.
One would appear in video conferences behind a fake official desk, donning a dark suit and a silicone mask of Le Drian.
Chikli and Lasarevitsch denied the charges.
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