Almost half the country has had their personal and health data stolen by hackers ealier this year from the electronic prescriptions provider MediSecure.

That's approximately 12.9 million Australians, it's one of the biggest breaches in Australian history.

MediSecure went into voluntary administration in June after the federal government declined to provide it with a financial bailout. So the company has folded but it's too late for those who's data has been breached. 

Guest: Troy Hunt, founder of website 'Have I Been Pwned' and is a web security consultant