Information Assurance

11.9. Conclusion

In this chapter, we have discussed the physical security problems in an AON and mainly focused on crosstalk attacks because of their propagation capability. We have developed a crosstalk attack as well as a monitor model. Based on these models, we proposed the concept of a monitor-segment and developed necessary and sufficient conditions for a one-crosstalk attack diagnosable and k-crosstalk attack diagnosable network. We have also developed several sparse monitor placement algorithms and an attack diagnosis (location) algorithm based on the observations made during monitor operation.

We have shown that it is possible to design diagnosable networks with sparse monitoring as long as appropriate routing and test connection strategies ...