TeleSign Corporation is an internet security company based in Los Angeles, California. Founded in 2005 by Darren Berkovitz, Ryan Disraeli and Stacy Stubblefield, the company mainly provides Two-factor authentication services, a secure supplementary method of preventing illicit access to online accounts used by many companies like iTunes, Yahoo, Gmail, Outlook, Twitter, Facebook, Bank of America, Chase, Discover, PayPal, Etsy, and more. Aled Miles is the current CEO of the company. TeleSign offers cloud-based APIs and SDKs that help prevent registration fraud, reduce the risk of account takeover and securely authenticate end-users across their account lifecycle. Its PhoneID Score service analyzes phone data such phone number, device model number, telecom operator and type of SIM connection and result a score between 0 and 1000, with 0 best and 1000 worst.