Costa Mesa-based Experian, the provider of credit reporting services and related information, announced this morning that it has acquired 41st Parameter, a provider of device identification technology for the cyber security market. Financial terms of the acquisition were not announced. 41st Parameter's technology uses device fingerprints to identify web fraud. Experian said the acquisition will strengthen its web fraud detection and risk-based identity authentication capabilities. 4st Parameter was venture backed by JAFCO Ventures, Kleiner Perkins Caufield and Byers, and Norwest Venture Partners, along with others.