 LAS VEGAS, Aug. 2, 2021 PRNewswire -- Black Hat USA -- Qualys, Inc. NASDAQ: QLYS, a pioneer and leading provider of disruptive cloud-based IT, security and compliance solutions, will be leading four speaking sessions at Black Hat and DEF CON 2021. At this years show, Qualys is laser-focused on bringing more security to its customers through its holistic platform. 