How can I block my internet history from roommates router?

> Can he see my internet history and

If he cares to put the effort in, yes

> if so, is there a way I can prevent that?

Get an Internet connected computer outside his local network, install an HTTP proxy on it, access it though a VPN. That way everything that goes through the router will be encrypted.

First you may desire to get right of entry to your router and to try this you may desire to comprehend your router "password" which you will come across interior the set of training presented. type 192.168.a million.a million. and stick to the teachings on your router no longer all are the comparable. replace the password to get right of entry to your router and supply it an get right of entry to "wep" key that's yet another password your computer seems at on your computer to pass on line. Write down your new passwords. save all of it trouble-free not greater then 8 numbers and letters mixed.

Unless the router has some kind of website address logging feature then you are fine and he shouldnt be able to see what you are browsing.