Ben Edelman – CFP 2003
The effect of technical happenstance on filtering granularity
•Proxy servers allow blocking of specific URLs
•Router-based filtering must block entire web servers, causing more unintended blocking (“overblocking”).
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•Saudi Arabia: single international gateway to Internet, relatively less Internet traffic → proxy-based filtering → relatively more granular filtering
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•China: multiple international gateways, high
traffic → router-based filtering → less granular,
more overblocking (sites sharing servers, etc.)
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