Sure. Just type in the default ip address to access the router, most routers are 10.0.0.1 or 192.168.1.1. It will have the address on a sticker or something on the router. Then just find the encryption page and type in a password (older routers have to have 8 or 16 characters). And then just click update, or save changes, whatever button will save the changes to the router. Thats it.