  In this manuscript we describe a hidden conformal symmetry of the second
Randall-Sundrum model (RS2). We show how this can be used to localize fermions
of both chiralities. The conformal symmetry leaves few free dimensionless
constants and constrains the allowed interactions. In this formulation the
warping of the extra dimension emerges from a partial breaking of the conformal
symmetry in five dimensions. The solution of the system can be described in two
alternative gauges: by the metric or by the conformon. By considering this as a
fundamental symmetry we construct a conformally invariant action for a vector
field which provides a massless photon localized over a Minkowski brane. This
is obtained by a conformal non-minimal coupling that breaks the gauge symmetry
in five dimensions. We further consider a generalization of the model by
including conformally invariant torsion. By coupling torsion non-minimally to
fermions we obtain a localized zero mode of both chiralities completing the
consistence of the model. The inclusion of torsion introduces a fermion quartic
interaction that can be used to probe the existence of large extra dimensions
and the validity of the model. This seems to point to the fact that conformal
symmetry may be more fundamental than gauge symmetry and that this is the
missing ingredient for the full consistence of RS scenarios.
