Google revealed its move following attempts to hack Gmail accounts of human rights activists.
The search giant said analysis showed that the series of attacks originated from inside China.
“This wasn’t in my opinion ground-breaking as an attack. We see this fairly regularly. said Mikko Hypponen, of security firm F-Secure.
“Most companies just never go public,” he added.
“Human-rights activists are the biggest target for China,” said Mr Hypponen. “Everyone from Freedom for Tibet to Falun Gong supporters and those involved in Liberation for Saigon are hit.” (more…)