Encore: Lightweight Measurement of Web Censorship with Cross-Origin Requests

  • A system for measuring web censorship that uses cross-region requests to collect data about blocked web content. The system is designed to be lightweight and deployable, and it can be used to measure censorship in a variety of contexts.

  • The Encore system works by embedding a small JavaScript code snippet on a website, which sends cross-origin requests to a number of different websites, including ones that are known to be censored in the target country. The responses from these requests are used to analyzed to determine whether the requested content has been blocked or not.

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