Watching or downloading YouTube video clips could put you at risk from identity and data theft, according to Secure Computing and ComSentry Network. They warn that the recent expansion by YouTube into Europe could put users of the video sharing network at risk. Peer to peer networks are also blamed.

The chief YouTube culprit is the Ziob trojan, which poses as a fake video file and then bombards users with ads. The ads have the potential to contain ID stealing code.