[zackzackzack]

I misread his statement and made it conform to what I know to be true. There is a finite field of size 256, and you could enumerate the elements in the field with all numbers mod 256, but the normal *,+ wouldn't work persay. The inverse of 2 could be any of the other numbers in the field, even itself. Should have been more careful; I usually try to avoid talking about Math on the internet.