A mystery electronic spy network apparently based in China has infiltrated hundreds of computers around the world and stolen files and documents, Canadian researchers have revealed.

The network, dubbed GhostNet, appears to target embassies, media groups, NGOs, international organisations, government foreign ministries and the offices of the Dalai Lama, leader of the Tibetan exile movement. The researchers, based at Toronto University's Munk Centre for International Studies, said their discovery had profound implications.

"This report serves as a wake-up call... these are major disruptive capabilities that the professional information security community, as well as policymakers, need to come to terms with rapidly," said researchers Ron Deibert and Rafal Rohozinski.

Here is the researchers' summary; a full report, 'Tracking "GhostNet": Investigating a Cyber Espionage Network' will be issued this weekend."