'Here's your personal data': how an anonymous tipoff revealed Red Cross breach

A security expert sounded the alarm after he was sent the personal details of more than half a million Australian blood donors

A Microsoft regional director and security developer, Troy Hunt, was contacted early on Tuesday morning by an anonymous person on Twitter who told him he had obtained personal information about him and his wife.

"This guy reached out to me and said, 'Here's your personal data,'" Hunt said.