Optus seriously interfered with the privacy of about 9.5 million Australians in failing to protect their data, and could face hefty fines for each breach in new court action.
The Office of the Australian Information Commissioner (OAIC) has filed Federal Court proceedings against the telco for the September 2022 cyber attack, which resulted customers' private data - including home addresses, birth dates, phone numbers and email addresses - finding its way to the dark web.
