By Jim Finkle BOSTON Reuters – Tor, the Internet privacy protecting service, said on Wednesday it discovered a compromise on its network that indicated somebody was trying to monitor the activity of its users. “While we don’t know when they started doing the attack, users who operated or accessed hidden services from early February through July 4 should assume they were affected,” Tor said in a blog entry. Tor is an anonymity tool designed to protect the identity of Internet users by routing traffic through multiple nodes around the globe. The blog post said that it was not sure how much information the attackers were able to obtain in their efforts to monitor traffic on Tor.