London - based start - up Callsign has secured $ 35 m in funding from investors including NightDragon Security , Google and Google Ventures . The investment comes as companies around the world seek to protect themselves from the rising cyber security threat. Callsign , whose clients include Deutsche Bank and Lloyds Bank , has developed technology to determine the identities of users accessing websites and apps . " The system analyses data on the web and mobile sessions to decide on whether the person is who they say they are " , says CEO Zia Khan . The funds will be used to increase the scope of the company 's sales operations and grow overseas .
London - based start - up Callsign has secured $ 35 m in funding from investors including NightDragon Security , Google and Google Ventures . Callsign , whose clients include Deutsche Bank and Lloyds Bank , has developed technology to determine the identities of users accessing websites and apps . " The system analyses data on the web and mobile sessions to decide on whether the person is who they say they are " , says CEO Zia Khan . The funds will be used to increase the scope of the company 's sales operations and grow overseas .