Abstract: Consider the 2-category of Z/2-graded Algebras, bimodules, and intertwiners. The spin group Spin(n) can be described as the automorphism group of the identity 1-arrow of Cliff(n), that act on the source by an element of O(n), and that act on the target trivially. An identical description of String(n) will be given, where we use instead our newly constructed 3-category of conformal nets.