Charting Censorship Resilience Global Internet Reachability: A Quantitative Approach
CoRR(2024)
摘要
Internet censorship and global Internet reachability are prevalent topics of
today's Internet. Nonetheless, the impact of network topology and Internet
architecture to these aspects of the Internet is under-explored. With the goal
of informing policy discussions with an objective basis, we present an approach
for evaluating both censorship resilience and global Internet reachability
using quantitative network metrics, which are applicable to current BGP/IP
networks and also to alternative Internet network architectures. We devise and
instantiate the metric on the network topology of multiple countries, comparing
the BGP/IP network, an overlay network using a waypoint mechanism for
circumventing undesired nodes, and the path-aware Internet architecture SCION.
The novelty of the approach resides in providing a metric enabling the analysis
of these aspects of the Internet at the routing level, taking into account the
innate properties of the routing protocol and architecture. We demonstrate that
the Internet topology matters, and strongly influences both censorship
resilience and reachability to the global Internet. Finally, we argue that
access to multiple paths accompanied with path-awareness could enable a higher
level of censorship resilience compared to the current Internet, and reduce the
centralization of Internet routing.
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