Digital Shields News Today

Firls. and then in january a a hotel in austria was hit. the department of homeland security warned the u.s. users to protect themselves by updating systems with latest patches and not opening up strange e-mails or links. and back up your data. and joining us is a correspondent from london, and this is a massive attack, and how do you go about finding who is behind this and how can you go about trying to trace how they want to be paid in bit coins, and is that possible? >> it is very, very diffi...