Illuma | 1,856 followers on LinkedIn. Frictionless Voice Authentication & Fraud Prevention | Illuma is a FinTech and R&D company headquartered in Plano, Texas. The organization’s flagship product, IllumaSHIELD™, replaces traditional knowledge-based authentication practices with an effortless and secure real-time voice authentication solution to enhance caller experience, improve operational efficiency, and prevent fraud in contact centers. Enhancing Caller Experience, Efficiency, and Security.