  Nowadays, both the amount of cyberattacks and their sophistication have
considerably increased, and their prevention is of concern of most of
organizations. Cooperation by means of information sharing is a promising
strategy to address this problem, but unfortunately it poses many challenges.
Indeed, looking for a win-win environment is not straightforward and
organizations are not properly motivated to share information. This work
presents a model to analyse the benefits and drawbacks of information sharing
among organizations that presents a certain level of dependency. The proposed
model applies functional dependency network analysis to emulate attacks
propagation and game theory for information sharing management. We present a
simulation framework implementing the model that allows for testing different
sharing strategies under several network and attack settings. Experiments using
simulated environments show how the proposed model provides insights on which
conditions and scenarios are beneficial for information sharing.
