In one of the most significant security breaches, it’s been revealed the personal data of 50 million Facebook users was accessed by a London-based firm.

Cambridge Analytica is accused of allegedly using the information to directly influence votes in the 2016 US election.

The UK is now demanding  Facebook boss Mark Zuckerberg goes to London to face questioning, with the billionaire admitting he’s made mistakes in protecting personal data.

Zuckerberg has broken his silence on the matter, saying it was “a major breach of trust” and that he’s “really sorry that this happened”.

Ben Fordham speaks with privacy expert at the University of Technology Sydney, Doctor Sacha Molitorisz.

“This is an issue here, people’s private and personal details have been used in such a way that it’s affecting democracy.”

Listen to the full interview below