BOSARIS (Brno Speaker Recognition Summer Workshop 2010) was a 5-week research workshop, held at BUT in July 2010, and following the Odyssey 2010: The Speaker and Language Recognition Workshop. Organized around the core of the group that gathered in 2008 at Johns Hopkins summer workshop 'Robust Speaker Recognition over Varying Channels', the participants addressed the issues of inter-session and environmental robustness, and the speed of SRE systems.