"Microsoft and Skype didn't make security a priority": Dishing the dirt on the Silicon Valley giants

Find out the one major weakness in the security models of the Silicon Valley giants, and how one calculation appears to dominate their thinking on security.

In this exclusive interview, we ask encryption guru David Gurle whether the technology giants like Google, Facebook and Skype are doing enough to keep up with advancing security threats; let's just say he didn't have glowing praise.

"Privacy is a right, not a privilege," David told us. "But that's changing."

Check out our video to discover what David learned during his time at Microsoft and Skype. The answer might surprise you.

David Gurle is Founder & CEO of Perzo Inc, a secure email and SMS service.

Missed the previous instalments in this series?

How Perzo messaging could help you beat the NSA

What does military grade encryption mean - and why do you need it?