Cassius was a French musical duo active from 1988 to 2019 and consisting of producers Philippe Cerboneschi and Hubert Blanc-Francard, better known as Zdar and Boombass (or sometimes Philippe Zdar and Hubert Boombass). Under its different incarnations the duo is likened to the "French touch" movement of electronic music in the second half of the 1990s.

Source: Wikipedia (https://en.wikipedia.org/wiki/Cassius_(band))