Why did an OpenAI system hack Australia's health system - and can it be stopped in the future?

Figure caption, Watch: What you need to know about the OpenAI Australian government hack

An OpenAI agent has gone "rogue" and "infiltrated" an Australian government website in what cyber-security experts are calling the first hack of its kind.

But why did it take the government months to discover what happened - and could it happen again?

The hack was carried out by an AI agent - an autonomous computer program that uses AI to complete a task with minimal human oversight.

On 18 June one of OpenAI's agents went rogue during a test exercise - the company has said it was supposed to "look up answers, and available statistics for questions about Australia during an internal evaluation".

In the process it "infiltrated" a private statistics portal containing "non-sensitive" data from Australia's universal healthcare scheme Medicare, Prime Minister Anthony Albanese said.