His visit comes after health fund Medibank earlier this week ruled out paying a ransom to stop criminals from releasing customer data of 9.7 million Australians. Medibank’s woes follow telecommunications company Optus’s data breach, which involved the personal information of 9.8 million customers, while a Woolworths subsidiary, MyDeal, had the details of 2.2 million customers stolen and sold online. Professor Martin said failing to stop breaches and ransomware attacks would have a cumulative effect and damage confidence in the digital economy. “If they’re haemorrhaging data all the time, or getting ransomed all the time, then that’s not going to help…