Cyber security experts are warning that the growing practice of sharing and storing information online could make more companies and institutions vulnerable to attack from hackers.
The warning comes as the full extent of a major attack by the hacking group LulzSec becomes clearer.
LulzSec have hacked several global companies, including Sony Pictures, Nintendo and Fox News. Yesterday, they even brought down a website linked to the CIA.
It is not clear who the group is but last night they posted 62,000 email addresses and passwords online.
The addresses included Gmail and Hotmail accounts. There were also details from Australian Government departments, local councils in Victoria and New South Wales, as well as schools and universities.
The chief technology officer for cybersecurity consultancy Pure Hacking, Ty Miller, says attacks are becoming increasingly sophisticated.
He says they are unlikely to stop because the victims seldom have the resources to find and prosecute hackers.
“We’ll get companies ringing us up saying that they’ve been compromised. Every single time we get called in we say to them, ‘Do you want to go after these people to take them to court or do you just want it cleaned up and get your systems up and running?’ And every single time they say ‘We just want it cleaned up and get back up and running again’,” he said.