  We prove that the boundaries of all non-trivial 1+1 dimensional intrinsically
fermionic symmetry-protected-topological phases, protected by finite on-site
symmetries (unitary or anti-unitary), are supersymmetric quantum mechanical
systems. This supersymmetry does not require any fine-tuning of the underlying
Hamiltonian, arises entirely as a consequence of the boundary 't Hooft anomaly
that classifies the phase and is related to a `Bose-Fermi' degeneracy different
in nature from other well known degeneracies such as Kramers doublets.
