Originally posted by elfmotat
If you have mac or windows then it would be quite easy to crack your password and install a keylogger. With that they could get into anything you've logged into recently - including email, NGU, porn sites, etc. He won't be able to get any information on the sites you've been visiting as long as your router is password protected and YOU pay the bill. So basically, if he knows what he is doing then it is possible as long as he has physical access to your computer.