It's not one with a chip, just a good old fashioned key.
I just called my dad, and he said to call Goldstein, the local Subaru dealership, and jump through the hoops with them to get a new set made. Apparently all they need is the VIN, some ID/proof of ownership, and they can cut a new set pretty easily.
Bromance Crew, since '08
'screw almost alll of oyu' - An example of a 12-year old dumbass.
03 Subarus don't have specially programmed computer chips in them though. All you need is a blank key and get 2 or 3 more made for the extra $4 at Home Depot. I have an extra at my house, school, and in my ski jacket.