  We study the problem of secure transmission over a Gaussian two-user
multi-input single-output (MISO) broadcast channel under the assumption that
links connecting the transmitter to the two receivers may have unequal strength
statistically. In addition to this, the state of the channel to each receiver
is conveyed in a strictly causal manner to the transmitter. We focus on a two
state topological setting of strong v.s. weak links. Under these assumptions,
we first consider the MISO wiretap channel and establish bounds on generalized
secure degrees of freedom (GSDoF). Next, we extend this model to the two-user
MISO broadcast channel and establish inner and outer bounds on GSDoF region
with different topology states. The encoding scheme sheds light on the usage of
both resources, i.e., topology of the model and strictly causal channel state
information at the transmitter (CSIT); and, allows digitization and
multi-casting of overheard side information, while transmitting confidential
message over the stronger link. Furthermore, for a special class of channels,
we show that the established bounds agree and so we characterize the sum GSDoF.
