  A secret key agreement setup between three users is considered in which each
of the users 1 and 2 intends to share a secret key with user 3 and users 1 and
2 are eavesdroppers with respect to each other. The three users observe i.i.d.
outputs of correlated sources and there is a generalized discrete memoryless
multiple access channel (GDMMAC) from users 1 and 2 to user 3 for communication
between the users. The secret key agreement is established using the correlated
sources and the GDMMAC. In this setup, inner and outer bounds of the secret key
capacity region are investigated. Moreover, for a special case where the
channel inputs and outputs and the sources form Markov chains in some order,
the secret key capacity region is derived. Also a Gaussian case is considered
in this setup.
