  Correlated sources are present in communication systems where protocols
ensure that there is some predetermined information for sources to transmit.
Here, two correlated sources across a channel with eavesdroppers are
investigated, and conditions for perfect secrecy when some channel information
and some source data symbols (the predetermined information) have been
wiretapped are determined. The adversary in this situation has access to more
information than if a link is wiretapped only and can thus determine more about
a particular source. This scenario caters for an application where the
eavesdropper has access to some preexisting information. We provide bounds for
the channel and key rates for this scenario. Further, we provide a method to
reduce the key lengths required for perfect secrecy.
