Partitioning the Internet

This paper presents experimental results for calculating both node- and edge separators on Autonomous System graphs generated from BGP routing information. The separator of a network graph describes a range of interesting properties as it captures components that are critical to overall connectivity. These components play special roles in terms of routing and deserve special attention from those in-charge of network security and resilience. We present empirical evidence showing that the Autonomous System Graph (AS Graph) is hard to separate and large portions always remain connected even in the case of a significant number of concurrent Byzantine failures of Autonomous Systems or connections between Autonomous Systems.