  It is a well-known fact that feedback does not increase the capacity of
point-to-point memoryless channels, however, its effect in secure
communications is not fully understood yet. In this work, an achievable scheme
for the wiretap channel with generalized feedback is presented. This scheme,
which uses the feedback signal to generate a shared secret key between the
legitimate users, encrypts the message to be sent at the bit level. New
capacity results for a class of channels are provided, as well as some new
insights into the secret key agreement problem. Moreover, this scheme recovers
previously reported rate regions from the literature, and thus it can be seen
as a generalization that unifies several results in the field.
