41st Parameter

The 41st Parameter was a leading provider of device identification and web fraud detection solutions, helping financial institutions, e-commerce companies, and other enterprises screen fraudulent transactions at scale. The company's patented technology analyzed device-level signals to distinguish legitimate users from fraudsters without degrading the customer experience. At the time of acquisition, its platform screened more than 15 billion fraud events per year — over 3,300 per second — for clients worldwide. The 41st Parameter was founded in 2004 in Scottsdale, Arizona, and was acquired by Experian in October 2013, becoming part of Experian's Decision Analytics division.