In this paper we study the following mechanism design problem: in a system of
networks where each  possesses beliefs of one another, with the truth of an
entity at best only known to itself, how to construct incentive mechanisms for
them to participate in a collective effort to contribute their information
without violating self-interest, so that more accurate assessment may be
obtained.  We introduce a number of utility models that capture a network's
desire to maintain security and/or reachability and examine whether networks
can
be incentivized to provide data within this context.  For each model, we
either
design a mechanism that achieves the optimal performance (solution to the
corresponding centralized problem), or present incentive compatible
sub-optimal
solutions.