  These two lectures constitute a reappraisal and an update of the status of
the Flavour Changing Neutral Current (FCNC) and CP violation issues in
supersymmetry. The first lecture discusses these points in the framework of the
Minimal Supersymmetric Standard Model (MSSM), while the second one provides an
analysis in a generic low-energy supersymmetric extension of the Standard
Model. The goal of these lectures is twofold: on one hand we present a
qualitative and quantitative discussion of the threat that FCNC and CP
violation represent on supersymmetry model building; on the other hand, we
point out how precious FCNC and CP violation may be in obtaining some signals
of the presence of supersymmetry at low energy in the years that separate us
from the advent of LHC physics. In particular, concerning this latter point, we
emphasize and thoroughly analyze the role of experimental searches for rare B
decays and CP violation in B physics.
